英文成语轻松说第100期:不知好歹
日期:2014-11-28 09:49(单词翻译:单击)
不知好歹------don't know chalk from cheese
例句：
A: I don't know why he deserted his good girlfiriend.
我不知道他为何拋弃他的好女友。
B: In fact, he often changes girlfiriend, for he doesn't know chalk from cheese.
事实上，他经常换女友，因为他不知好歹。
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