which
英 [w?t?]
美[w?t?]
- pron. 哪/那一個(gè)；哪/那一些
- adj. 哪一個(gè)；哪一些
詞組搭配
which is which
used when two or more people or things are difficult to distinguish from each other
哪一個(gè)是哪一個(gè)；什么是什么
there is no confusion as to which is which.
哪個(gè)是哪個(gè)，不會(huì)混淆。