to enter a room or building

Do you want to come in for a cup of tea? 你想进来喝杯茶吗？

Hi, come in - great to see you! 嘿，快进来——见到你真高兴！

If a fashion or product comes in, it becomes available or popular.

Flared trousers first came in during the 1970s. 喇叭裤最早出现于70年代。

to be useful for a particular purpose

Keep it, it might come in useful. 留着它，也许会有用。

The money will come in handy when I want to travel. 我想去旅游时，这些钱会派上用场的。

Oh, that spanner will come in handy for fixing the plumbing.

Thanks for lending me your bike. It came in handy while my car was in the shop.

Those fabric scraps came in useful when I needed to mend the quilt.

When news or information comes in, it is received.

Reports are just coming in of a major accident on the motorway. 刚刚收到高速路上发生重大事故的报道。

If you have money coming in, you receive it as income.

With Dave unemployed, we don't have much money coming in at the moment. 戴夫失业了，我们目前没有多少收入。

to become involved in a situation, story, or plan

We need expert advice, and that's where you come in. 我们需要内行的意见，这正是用得着你的地方。

to finish a race in first, second, etc. position

Burns came in second in the 100 metres.

She came in fourth overall but posted her best time yet.

The horse was favoured to win, but thanks to jockey error came in dead last.

If you come in fifth place, you won't move on to the next round - only the top four performers progress to later rounds.

When the sea or the tide comes in, the water moves forwards to cover more of the beach.

Opposite: go out (SEA)