I'm just wondering how he could've boarded the plane completely undetected by ground crew.我搞不懂他怎么能完全避开地勤人员潜入飞机

ground crew地勤人员

The ground crew is to make ready the airplane for take-off.

地勤人员将为飞机的起飞作准备。

You sound like a journalist.你口气真像记者

sound like听起来像

It sound like a nice room. can we take a look at it?

听起来不错，能不能看一看房间。

The song sound like a variation of a very old and familiar tune.

这首歌像是一个熟悉的旧曲调的变奏曲

Detectives are still on your side last I checked.我记得警方也站你这边吧

on one's side站在某人一方

I am altogether on your side in this matter.

在这个问题上我完全支持你。

If it was on your side,you would win.

风向对你有利，你就赢。