Sir, I know that bag is way over the weight limit for carryon.

先生，那已经远远超过 随身行李的重量限制。

Assuming I can bring my wife. She hardly takes up any room. She's basically a carryon.

前提是能，她完全不占地方，基本就手提行李大小。

It is very helpful for a lot of travelers who are trying to take only a carryon bag.

这对很多只想随身包的旅客来说是很有帮助的。