我对汽车怎样工作有一个大概的了解。

I have a general idea of how a car works.

我已经了解你们计划的大概情况，现在请告诉我计划的细节。

I have a broad general idea of your plan: now give me the details.

他们只是大概知道那个地方的位置。

They had only a vague idea where the place was.

我猜想这工作大概需要两天左右的时间吧。

I would imagine the job will take about two days.

这次修理大概得花你200多英镑。

The repairs could set you back over £ 200.

我大概能腾出时间去看望他们。

I can probably make the time to see them.

她大概是班里最聪明的学生。

She's probably the brightest student in the class.

我们每月大概去那里一到两次。

We go there maybe once or twice a month.

我的精神集中不起来，大概是太累了吧。

I couldn't concentrate, presumably because I was so tired.

这大概是个馊主意，但管它呢！

This is probably a bad idea, but what the hey!

这个大概得花多少钱？

How much will it cost, more or less?

你恢复得不错，大概可以做些轻微的运动了。

You are probably well enough to take a little light exercise.

到机场大概需要半小时。

It takes about half an hour to get to the airport.