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2011年7月6日（周三）上午约11点，布赖恩·松吉（Brian Matayoshi）夫妇沿黄石公园 Wapiti Lake 步道向西返回停车处；步道位于 South Rim Drive 一侧、Canyon Village 以南，事发处离步道起点约1.5英里。
原文引用 2 处
「They were about one and one-half miles from the trailhead off South Rim Drive, south of Canyon Village」
Powell Tribune · 2011-07-07
「hiking Wednesday morning on the Wapiti Lake Trail, which is located off the South Rim Drive, south of Canyon Village」
NPR · 2011-07-07
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这是黄石公园自1986年以来首起灰熊致死事件，也是黄石地区一年多来的第三起。
原文引用 3 处
「First bear-caused human death in the park since 1986.」
ABC News · 2011-07-06
「first fatal grizzly mauling since 1986, but the third in the Yellowstone region in just over a year」
NPR · 2011-07-07
「It was the park's first fatal grizzly mauling since 1986」
NBC News · 2011-07-07
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夫妇7月5日抵达公园，6日约早上8点半从 Wapiti Lake 野餐区附近出发徒步。
其中有低可信度来源
原文引用 2 处
「set out for a hike at about 8:30 a.m. after arriving in the park a day earlier」
NBC News · 2011-09-20
「at roughly 8.30am」
AOL · 2025-01-01
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据NBC News，10点过后，夫妇在步道上远远望见带着两只幼崽的母熊，停下拍照后，判断熊离步道较远，继续前行。
原文引用 2 处
「The couple first spied the mother grizzly with her two cubs just after 10 a.m., from a vantage point along the trail.」
NBC News · 2011-09-20
「stopped and took pictures from a distance of several hundred yards, then hiked on after deciding the animals were not near the trail.」
NBC News · 2011-09-20
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据NBC News，夫妇又走了约半英里后因蚊虫折返，不久后看到约100码外有一头大熊。
原文引用 1 处
「After another half mile, then turned back because they were annoyed by mosquitoes, and soon after saw a large bear off the trail about 100 yards away.」
NBC News · 2011-09-20
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据Powell Tribune，夫妇走出林地进入一片草甸时，在约100码外看见这头熊，随即后退并转身离开。
原文引用 1 处
「They saw the bear at about 100 yards away. They began backing away from the bear, then turned and walked away.」
Powell Tribune · 2011-07-07
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回头查看时，他们看到母熊沿步道向他们冲来；两人开始奔跑并呼喊。
其中有低可信度来源
原文引用 2 处
「The couple began running, but the bear caught up with them, attacking Mr. Matayoshi.」
NPR · 2011-07-07
「running east on the trail and yelling」
AOL · 2025-01-01
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据Powell Tribune，布赖恩让妻子快跑。
原文引用 1 处
「Mr. Matayoshi told his wife to run」
Powell Tribune · 2011-07-07
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调查报告称，夫妇从发现熊到被追上共奔逃约173码。
报道转述调查组报告；其中有低可信度来源
原文引用 2 处
「173-yard retreat after they encountered the bear」
NBC News · 2011-09-20
「After they fled for approximately 173 yards, the bear reached them.」
AOL · 2025-01-01
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母熊追上后袭击了布赖恩，他在现场死亡；约11点30分赶到的护林员确认其死亡。
原文引用 2 处
「Rangers arriving on the scene confirmed that Brian Matayoshi, 57, was dead」
Powell Tribune · 2011-07-07
「Her husband died at the scene, Nash said.」
The News Tribune · 2011-07-08
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关于妻子是否看到丈夫被袭击的说法不一致：公园早期说法称她没看到袭击过程，而依据事故报告的转述称她看到丈夫被熊击中。
公园早期说法与后来转述的事故报告不一致
原文引用 2 处
「The woman told park officials she didn't see the bear attack her husband.」
The News Tribune · 2011-07-08
「Marylyn recalls her husband stayed on his feet until he was 'hit' by the sow grizzly」
AOL · 2025-01-01
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据AOL，妻子躲到了一些倒木后面。
仅见于AOL转述的事故报告，该来源可信度较低。
原文引用 1 处
「while she sought refuge behind some fallen timber」
AOL · 2025-01-01
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母熊随后走向倒地的妻子，咬住她的背包把她提离地面又放下；她一动不动装死，母熊离开。
原文引用 2 处
「The bear bit her daypack, lifting her from the ground and then dropping her. She remained still and the bear left the area.」
NPR · 2011-07-07
「She played dead and the sow left, Wenk said.」
Powell Tribune · 2011-07-07
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妻子的手机没有信号，据报告她拨打911共21次未接通；附近徒步者听到呼救声，用手机报了警。
原文引用 2 处
「her cellphone log showed she tried 21 times — but never got through.」
NBC News · 2011-09-20
「hikers who found her were able to summon help with their cell phone, Wenk said.」
Powell Tribune · 2011-07-07
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妻子未就医，据称只有擦伤或淤青。
原文引用 2 处
「The wife suffered bumps and bruises and did not require medical attention, officials said.」
ABC News · 2011-07-06
「didn't seek medical attention」
The News Tribune · 2011-07-08
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夫妇没有携带防熊喷雾。
事发当天公园发言人曾说尚不清楚是否携带，后经确认未带
原文引用 2 处
「They did not have bear spray」
Powell Tribune · 2011-07-07
「The couple was not carrying bear spray」
NBC News · 2011-09-20
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关于夫妇此前来过黄石几次，说法不一：一说这是第四次到访，一说是第五次。
两处对到访次数的算法不同
原文引用 2 处
「It was the Matayoshis fourth visit to the park, but the first in which they had seen any bears.」
NBC News · 2011-09-20
「The pair had previously made four uneventful visits」
AOL · 2025-01-01
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遇难者为57岁的布赖恩·松吉，来自加利福尼亚州托伦斯。
原文引用 2 处
「The victim was identified as Brian Matayoshi, 57, of Torrance, Calif.」
NBC News · 2011-07-07
「The man was Brian Matayoshi of Torrence, Calif., the Park Service just announced.」
NPR · 2011-07-07
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据NBC News，公园发言人早先的说法是夫妇两次看到这只熊：第一次继续前行，第二次母熊冲了过来。
来自公园发言人的转述
原文引用 1 处
「Nash said the couple saw the bear and her cubs twice on their hike.」
NBC News · 2011-07-07
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公园最初判断这是母熊保护幼崽的防御性攻击，而非捕食。
原文引用 3 处
「The initial indication is the sow grizzly was protecting her cubs」
ABC News · 2011-07-06
「It was not predatory」
Powell Tribune · 2011-07-07
「In an apparent attempt to defend a perceived threat to her cubs, the bear attacked and fatally wounded the man」
NBC News · 2011-07-07
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据Powell Tribune，公园生物学家说，捕食性接近通常是安静缓慢的，此次的表现符合防御行为；官方判断母熊带有两只约6个月大的幼崽。
原文引用 2 处
「Predatory encounters usually entail silent slow approaches by bears.」
Powell Tribune · 2011-07-07
「Evidence suggests the sow was acting defensively to protect what park officials believe are two 6-month-old cubs」
Powell Tribune · 2011-07-07
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这头母熊此前没有被记录、标记过，也没有攻击人的前科，公园因此当时决定不追捕。
原文引用 2 处
「The bear had never been documented before, never been tagged」
The News Tribune · 2011-07-08
「so we see no reason to take action against the bear.」
Powell Tribune · 2011-07-07
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事发后公园关闭了该区域的后山营地和步道，Wapiti Lake 步道关闭时间不定。
原文引用 2 处
「After the attack, all of Yellowstone's backcountry campsites and hiking trails in the area were closed.」
ABC News · 2011-07-06
「Wapiti Lake trail will remain closed for the foreseeable future, Nash said.」
Powell Tribune · 2011-07-07
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据Powell Tribune，公园宣布将召集跨部门专家组成审查委员会复盘此事。
原文引用 1 处
「A board of review composed of interagency experts will be convened to review the incident, Wenk said.」
Powell Tribune · 2011-07-07
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据NBC News，事发后初期，公园官员称夫妇遇熊后的处置是正确的。
原文引用 1 处
「park officials said the Matayoshis responded correctly when they encountered the bear」
NBC News · 2011-09-20
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据Petersen's Hunting，据媒体转述，公园向游客提供的熊区守则包括：不要奔跑或做突然动作、慢慢后退、不要丢掉背包；并建议携带防熊喷雾。
这是公园印发的一般性建议，由 Petersen's Hunting 转述。
原文引用 3 处
「Do not run or make sudden movements」
Petersen's Hunting · 2011-07-07
「Back away slowly」
Petersen's Hunting · 2011-07-07
「Do not drop your pack」
Petersen's Hunting · 2011-07-07
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据The News Tribune，公园通常建议游客留在指定步道、携带防熊喷雾、三人及以上结伴同行，并在视线盲区发出声响。
原文引用 1 处
「Stay on designated trails, carry bear spray, hike in groups of three or more, and make noise in places where a grizzly could be lurking.」
The News Tribune · 2011-07-08
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据YellowstonePark.com，8月下旬，另一名徒步者在 Mary Mountain 步道遇难，公园确认死因为灰熊袭击。
另一起独立事件，仅作背景
原文引用 1 处
「was found dead by two hikers along the Mary Mountain trail」
YellowstonePark.com · 2011-08-29
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据NBC News，事后公布的911录音中，一名徒步者说，他听到男子发出大声的、像动物叫的声音，似乎想吓走熊，还听到女子的尖叫。
原文引用 1 处
「It sounded like they were trying to scare the bear」
NBC News · 2011-09-20
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约两个月的调查后，调查组报告认为：母熊起初可能只是想探察这对夫妇，后来在他们边跑边喊的过程中变成了持续追逐。
原文措辞为 possibly；其中有低可信度来源
原文引用 2 处
「What possibly began as an attempt by the bear to assess the Matayoshis' activities became a sustained pursuit of them as they fled running and yelling on the trail」
NBC News · 2011-09-20
「What possibly began as an attempt by the bear to assess the Matayoshis' activities became a sustained pursuit of them as they fled running and yelling on the trail」
AOL · 2025-01-01
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推测：夫妇奔跑和呼喊可能触发了熊的追逐反应，但无人能确知熊当时的想法。
原文引用 2 处
「suggested that the Matayoshis were running from the grizzly, and that may have incited the attack」
Powell Tribune · 2012-03-06
「there is no way to definitely know what the bear was thinking or reacting to」
The News Tribune · 2011-07-08
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据Powell Tribune，9月28日，涉事母熊与两只幼崽被捕获；母熊于10月2日被安乐死，幼崽送往西黄石的灰熊与狼探索中心。
原文引用 1 处
「She was euthanized Oct. 2 and her cubs were placed under the care of the Grizzly and Wolf Discovery Center in West Yellowstone, Mont., Nash said.」
Powell Tribune · 2012-03-06
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据Powell Tribune，DNA证据显示，导致松吉死亡的母熊曾出现在第二起死亡现场，但无法确定是哪头熊杀死了第二名受害者。
原文引用 2 处
「based on DNA evidence, they do know the sow responsible for Matayoshi’s death on Wapiti Lake trail also was at the site of Wallace’s death」
Powell Tribune · 2012-03-06
「There is no way to know which specific animal killed Mr. Wallace」
Powell Tribune · 2012-03-06
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