There is a sign saying Keep off the Grass a park.

He was trying to keep down what he had for lunch.

他正在试图将中午所吃的保留在胃里.

They hired hunters to keep down the deer population.

他们聘请猎人来减少鹿群数量.

The gardener takes a lot of trouble to keep down the weeds.

那位园丁费了好大劲才把杂草除去.

I keep down my expenses this year.

我紧缩今年的开支.

Keep down! You mustn't let anybody see you.

蹲下! 一定不要让人看见你.

He couldn't keep down his anger.

他按捺不住自己的怒火.

They are taking steps to keep down the rabbit population.

他们采取步骤控制兔子的繁殖增长.

Keep behind, that group of people will lead you to the cinema.

跟着走, 那群人会带你到电影院的.

I was compelled to keep behind the young men.

我被迫跟在年轻男子的后面.

If you're passionate about the topic, then chances are you'll keep about it.

如果你对话题保持狂热, 你多半能做到坚持写博文.

I don't know the answer. And that's why I keep about boiling frogs.

答案我并不知道, 也正因为如此,我才一直在思考“沸蛙 ” 之说.

I keep about how this is so new for you? Is that true?

我不断地听说这对你是一种新的 尝试,是真的 吗 ?

Why do you keep indoors on such a fine day?

这么好的天气你为什么还呆在家里?

It's pouring now, ifs best to keep indoors.

现在下着倾盆大雨, 最好呆在家里.

You ought to keep indoors with that heavy cold.

你患重感冒应该留在屋里.

If one wants to keep ahead of your rivals, you'll have to work very hard.

要想在竞争对手面前保持领先地位, 你就得努力工作.

Microbial cell factories, the core of biorefinery technology, were keep ahead in the field of biorefinery.

微生物细胞工厂是生物炼制技术至关重要的核心.

In order to keep ahead, more and more software enterprises choose the strategy of outsourcing.

为了在激烈的竞争中保持优势, 越来越多的软件企业选择了业务外包策略.

We need to be more aggressive in order to keep ahead of our competitors.

我们必须加强攻势,才能走在竞争对手的前面.

If you want to keep ahead of your rivals, you'll have to work very hard.

如果你想超过对手们, 就得非常努力地工作.