1·They all look so alike to me that I'm never sure which is which.
它们在我看来简直一模一样，我永远分不清哪个是哪个。
—— 《柯林斯英汉双解大词典》
2·Now which is which?
现在，哪个是哪个呢？
3·The twins are so alike I can't tell which is which.
这一对双胞胎长得一模一样，我分不清谁是谁。
—— 《牛津词典》
4·The kittens look exactly alike—how can you tell which is which ?
这些小猫看上去一模一样，你怎么能分辨出哪只是哪只呢？
—— 《牛津词典》
5·Can you guess which is which?
猜猜看哪个是哪个？
6·Make sure you know which is which.
你要确信你能区分哪个是哪个。
7·The women aren't told which is which.
这些妇女没有被告知哪个是哪个。
8·Can you tell which is which?
你能看得出哪是哪吗？
9·And you know which is which.
你能分辨出来。
10·The problem is deciding which is which.
当前的问题是如何区分这两者。