The little girl is in a yellow swim-suit.

那个小女孩穿了一件黄色的泳衣。

We have a fresh stock of all kinds of swim suit.

我们刚进了一批各式各样的游泳衣。

Man: You must be going to some island to relax in the sun where all you need is a swim suit and a toothbrush.

你一定是要到某个小岛，在太阳底下放松放松，所以只需要一件泳衣和一支牙刷。