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.
It has time to escape to safety, or else they can just remain motionless.
它有时间逃到安全的地方，否则它们也可以保持不动。
3
Liao has built a special room named "family love room" in the police station, where Liao helped these left-behind children with their homework and taught them about safety in his spare time.