就在几周前，飞机工程师才发现他们并没有完全了解金属疲劳——四月一日，西北航空公司812航班使用的波音737-300型客机在从凤凰城飞往萨克拉门托的途中发现在机身的上半部有一个五英尺的裂纹，不得不紧急迫降。
Over the past few weeks, aircraft engineers have found they do not know quite as much about metal fatigue as they thought.
美国航空公司的航班在洛杉矶国际机场紧急迫降之后，人们从膨胀的滑梯撤退。
People evacuated down inflatable chutes after this American Airlines flight made an emergency landing at Los Angeles International Airport.
昨天三角航空公司的一架航班在夏威夷的野生动物避难所紧急迫降。
Yesterday a Delta airlines flight made an emergency landing at a wildlife refuge in Hawaii.
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