what’s done is done中的what’s是什么的缩写

what’s done is done中的what’s是什么的缩写 what's done is done what's done is done 是什么意思呀 ? What is done is done.是什么结构? 英语翻译What's done is done,what's past is past,rather than ask What\'s to be done? There’s no going back ‘cause what’s done is what is done is done what's being done to the clavichord What's done can not be undone. What's done cannot be undone what`s done cannot be undone