1. The National Transportation Safety Board says a preliminary exam shows evidence of metal fatigue on the Southwest Airlines jet engine that blew apart amid air.

metal fatigue 金屬疲勞

Do not let mattress locally under weight, avoid prolonged standing or let their kids jump on the mattress in order to avoid local compression, resulting in metal fatigue, impact resilience.
不要讓床墊局部受力過重，避免長期站立或讓小孩在床褥上跳躍，以免局部受壓，致使金屬疲勞，影響彈力XBMf)C;Hvt~。

2.The plane made an emergency landing in Philadelphia.

emergency 緊急的

Orman received emergency treatment from medics on the pitch.
奧曼在球場上接受了醫務人員的緊急治療wBAn+B2XzEd^。

n%,aFidJ*[U)#k^6@4tc#E,_9#)U-0gyd1eRLr6rh7 來源:可可英語 http://www.ccdyzl.cn/broadcast/201804/550157.shtml