To keep ahead you have to be brave.

Keep an eye on your competitors and keep ahead of them.

密切关注你的竞争对手并保持你的领先优势.

Management theory: science and technology keep ahead, honesty and credit mutual benefit.

经营理念: 科技领先 、 诚信互利.

If he continues to keep ahead, he will win the race.

如果他继续保持领先地位, 他将赢得这场比赛.

Don't try to keep ahead in the rat-race-it isn't worth it.

不要企图在你争我夺中占据领先地位 —— 那是不值得的.

If you can keep ahead, your boss will promote you.

如果你一直成绩出色, 你的老板将会提拨你.

They do not have to wear heavy clothes to keep warm.

天气是温暖的,他们不需要穿厚重的衣服来保暖.

The boys huddled together under the rock to keep warm.

男孩们在岩石下挤作一团,使身体暖和些.

Keep warm, drink plenty of hot water and get plenty of rest.

穿暖和些, 多喝热水,多休息.

The boy huddled together under the rock to keep warm.

男孩们在岩石下挤作一团,由此取暖.

He walked about in order to keep warm.

他来回走动使身体暖和.

I know not if I should speak to him or keep silent.

我不知道我是应该同他说话还是保持沉默.

I think you should keep silent.

我认为你应该保持沉默.

Would you be good enough to keep silent?

请你保持安静好吗?

But he could not keep silent.

但他不能一言不发.

You must learn when to speak and when to keep silent.

你必须学会知道什么时候讲话,什么时候沉默.

And yet he could not keep silent.

但是他又不能沉默不语.

Why do you keep silent?

你为什么不吭声?

It's something you should keep quiet about.

这是件需要你保密的事.

Those boys in the corner there must keep quiet.

那边角上的几个孩子必须保持安静.

They won't do anything to us if we keep quiet.

只要我们不声张,他们才不会难为我们呢.