我不知道哪一个是哪一个。

I don't know which is which.

youdao

他们甚至可以分辨出哪一个是自己母亲的声音，哪一个是陌生女性的声音。

They can even distinguish their mother's voice from that of a female stranger.

youdao

这些故事中哪一个是最可信？哪一个是最不可信的？为什么？ ！

Which hof these stories is the most believable? Which is the least believable? Why?

youdao

你能说出哪一个是鸭哪一个是鹅吗？

Can you tell which is a duck and which is a goose?

youdao

你能说出哪一个是鸭哪一个是鹅吗？

Can you tell which is a duck and which is a goose?

youdao