1·A bolt may have fallen off the plane's forward door.
飞机前舱门的一个门闩可能脱落了。
—— 《牛津词典》
2·We stop eating candies and chocolates when all of our teeth have fallen off.
当我们的牙齿全部脱落后,我们就不再吃糖果和巧克力了。
3·If you look out of the Windows on the port side, you will observe that the port wing has fallen off.
如果你从左边往外看,你就会看到那边的机翼已经脱落了。