Translation of "Suitcases" in Chinese

One of my suitcases is missing.

我的其中一个行李不见了。

I can carry those suitcases for you.

我可以幫你帶公事包過去喔。

One of the suitcases is completely empty.

行李中的一个完全是空的。

One of my suitcases is large, and the other one is medium.

我的手提包，一只是大的，另一只是中号的。