"what's that" in Chinese (Simplified)

那是什么？

Definition

当你看到或听到某个不认识的东西时，想要知道它是什么时常用的提问。

属口语表达，表示好奇、惊讶或困惑。通常用于询问看到或听到的某物，不适用于人（问人用“Who's that?”）。

What's that on the table?

桌子上**那是什么**？

I hear a sound. What's that?

我听到了一个声音。**那是什么**？

Look! What's that over there?

看！那边**那是什么**？

What's that supposed to mean?

**那是什么意思**？

Wait, what's that smell?

等等，**那是什么**味道？

Sorry, I didn't catch that — what's that again?

不好意思，我没听清，**那是什么**来着？