"know which is which" in Chinese (Traditional)

• 分辨哪一個是哪一個

Definition

能夠分辨兩個人或物體中的哪一個是哪一個；知道它們之間的區別。

Usage Notes (Chinese (Traditional))

經常用於兩個極為相似、容易混淆的事物或人（如雙胞胎、鑰匙、瓶子）。常出現在“不能/能否分辨哪一個是哪一個”的句子中。通常只用於兩者之間。

Examples

These apples look so similar, I can't know which is which.

這些蘋果太像了，我無法**分辨哪一個是哪一個**。

The twins dress alike, so it's hard to know which is which.

這對雙胞胎穿得一模一樣，很難**分辨哪一個是哪一個**。

If you mix up the bottles, you won't know which is which.

如果把瓶子弄混了，你就無法**分辨哪一個是哪一個**。

After labeling the keys, now I finally know which is which.

貼上標籤後，我終於**分得清哪一個是哪一個**了。

Honestly, with those new uniforms, I can't know which is which anymore.

說真的，穿上新制服後，我再也**分不清哪一個是哪一個**了。

There were so many bags at the airport, it was impossible to know which is which without tags.

機場有這麼多行李箱，沒有標籤根本**分辨不了哪一個是哪一個**。