创建可放弃的撤消单元。

Creates a discardable undo unit.

youdao

不可以，因为大部份人认为生命是不可放弃的。

E - no. Because most people think that life should not be abandoned.

youdao

我看过很多电视秀，但我还没有见过哪一个是完全不可放弃的。

I've liked a lot of TV shows but I've never seen one that wasn't completely disposable at any given minute.

youdao

In 1931 they dropped convertibility of the pound sterling still called pound sterling even though it's not silver it was gold.

在1931年，他们放弃了英镑的可兑换性,仍然叫做英镑的话,即便它不是银，而是金。

耶鲁公开课 - 金融市场课程节选

They dropped the pound convertibility.

于是他们放弃了英镑的可兑换性。

耶鲁公开课 - 金融市场课程节选