at

[æt]

prep.在, 向, 达
n.基普(老挝货币基本单位)(=att),[化]砹(极不稳定放射性元素)
abbr.密封的(=airtight)
abbr.气温(=air temperature)

例句与用法：

I'm good at it.

我做这个很在行。

I watch TV till ten at night.

我晚上看电视看到10点。

There is very little profit in selling newspapers at present.

现在卖报纸利润很少。

I have engaged a room at this hotel.

我已经在这个旅馆里预订了一个房间。

At 20 years of age the will reigns; at 30 the wit; at 40 the judgement.

20岁我们按意愿做事; 30岁我们凭智慧做事; 40岁我们靠判断做事。

The airplane flies at 900 kilometers an hour.

飞机以每小时900公里的速度飞行。

Please don't laugh at him.

请不要嘲笑他。

I met him at the bus stop.

我在公共汽车站遇到他的。

词形变化：

名词复数: at |

详细释义：

prep.

1. 在……地点

They were already waiting at the gate when I got there.

当我到达那里时, 他们已等候在门口了。

2. 在……时刻

Jane will meet her boy friend at Christmas.

简将在圣诞节和她男友见面。

3. 向, 朝, 对着

Don't shout at me.

别对我叫喊。

4. 在……方面

He is an expert at troubleshooting.

他是位排解争端的能手。

5. 因为, 由于

I woke at the sound of the bell.

随着铃响, 我醒了。

6. 从事于, 忙于

He is working hard at this thesis.

他正在努力地撰写论文。

7. 以(某种价格、速度等)

They sold the cloth at a dollar a yard.

他们以每码一元的价格出售这种布。