up

be up

1. 发生

What's up?

什么事?

up for

1. 打算; 被考虑

The house over there is up for sale.

那边的房子要出售。

up against

1. 面临……的

We are now up against difficulties.

我们现在正面临困难。

up and about

1. (病后)能起床走动的

You will be up and about next week.

下星期你就可以起床走动了。

up and down

1. 上上下下; 到处

We have looked for it up and down.

我们到处都找过了。

be up in/on

1. 熟悉; 精通

She is well up in English.

她精通英语。

ups and downs

1. 盛衰; 沉浮

The company has undergone many ups and downs.

这家公司历经盛衰浮沉。

up to

1. 忙于

What are you up to?

你在忙什么?