团队合作会随时间推移而改善：美国国家运输安全委员会发现，其民用航空数据库中，73%的事故发生在机组人员一起飞行的第一天。
Teamwork improves with time: America's National Transportation Safety Board found that 73% of the incidents in its civil-aviation database occurred on a crew's first day of flying together.
美国国家运输安全委员会正在对事故进行调查。
The National Transportation Safety Board is investigating the crash.
但仍然不清楚什么导致过热而美国国家运输安全委员会正在开展调查。
It's still unknown what cause the overheating and the National Transportation Safety Board is investigating.
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