We just came in to pick up something that might have been set aside?我們來找某樣被遺失的東西

pick up:撿起, 收集

It's against the rule to pick up the ball.

撿球是犯規的。

I'll call by and pick up my tools.

我會順便過來取我的工具。

set aside:留出

He set aside a little money each week.

他每周都留出一些錢備用。

I set aside my overcoat and took out my summer clothes.

我把大衣放起來，取出了夏天的衣服。

Well, you see, a friend of ours dropped something off那個，我們的一個朋友放了些東西

drop off:把…留下 ；掉落

The humper of my car seems to drop off.

我車的保險桿看上去好像要掉下來似的。

I'm never taking it off.打死我也不摘下來

take off:脫掉

However hot it is, he will not take off his coat.

無論多熱,他也不會脫掉外衣。

The doctor gestured me to take off my coat.

醫生做手勢要我脫去外套。