Question

There's是什么意思

Answer 1

Who's there 意思是“谁啊”

例句
1.The laughs come from not knowing who or what exactly is behind the door based on the initial response to “Who's there?
他们大笑并不是因为知道到底是谁或什么在门后面，而是源自于对最初问题“谁在那里？” 的回应。
2.What is it for that person who's there on Thursday to be the same person as the person who's sitting here lecturing to you today?
这意味了什么,周四和今天在这给你们上课的是同一个人,是同一个人？
3.Effectively it takes us half a second to answer the door and see who's there, but in the meantime we don't notice the phone ringing and the kettle boiling.
差不多等于说要花半秒去应答敲门，看看是谁，同时，我们没有注意到电话响起了铃声，壶水沸腾。

Answer 2

这是There
be句式;is是be动词.there+be动词组,成there
be句型.表示某地有某物

Answer 3

there
is是这里有
造句就比如there
is
an
apple(on
the
chair)
括号里的介词可有可无