lose是什么意思

　　Short of a miracle, we're certain to lose.

　　除非發生奇跡，否則我們輸定了。

　　His illness caused him to lose his memory.

　　他的病使他失去了記憶。

　　We all felt (that) we were unlucky to lose.

　　我們都認為我們輸了是運氣不好。