How to keep off Internet is an important technique problem.

The explorers made a camp fire to keep off wild animals.

探险队员们燃起篝火,使野兽不敢走近.

He told the boys playing football to keep off the grass.

他告诉那些踢足球的孩子们不要践踏草坪.

Keep off the grass, please!

请勿践踏草坪!

The doctor asked her to keep off school for a few days.

医生要她休息几天再去上学.

Keep off the premises.

请勿入内.

Mary : > Why do you keep on telling me to keep off the grass?

玛莉: 你为什么要我一直远离草地 呢 ?

Please keep off the grass.

不要践踏草地.

We should enhance our defenses to keep off the invading enemy.

我们要及时坚壁以防敌人侵入.

Keep off the lawn [ grass ] .

请勿践踏 草地.

Mary : > I like running on the grass. Why should I keep off the grass?

玛莉: 我喜欢在草地上跑步,我为什么得离开草地?

You must try to keep off strong spirits.

你要想法别喝厉害的酒.

He decided to keep off alcohol after the accident.

发生那次事故后,他决定不再饮酒.

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

公园里有个“勿踏草地”的标示.

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.