prevent 四级考研

Dentists advise their patients to brush and floss regularly to prevent their teeth from decaying.

牙医建议他们的病人定期刷牙并用洁牙线剔牙，以防止蛀牙。

Quinine is an effectual preventive for malaria.

奎宁是有效的疟疾预防药。

Vitamin C is supposed to prevent colds.

维生素C可以预防感冒。

I have been unavoidably prevented from coming.

我身不由己, 不能前往。

Prevent stern red anthema and cross infection.

可避免交叉感染。

Rheumatism prevents him form bending his back.

风湿病使他不能弯腰。

The diluent could prevent trimebutine maleate from precipitation.

能较好地阻止马来酸曲的结晶析出。

What prevented you from joining us last night?

昨天晚上什么事使你不能参加我们的晚会?

There will be a picnic if nothing prevents.

如果没有特别的情况，我们将举行野餐

A fireguard prevents children getting near the fire.

炉挡防止孩子们靠近炉火。

It is hard to prevent concrete from creeping.

很难防止水泥变形。

The police tried to prevent infiltration by drug traffickers.

警方尽力阻止毒品走私分子的潜入。

They took steps to prevent the spread of influenza.

他们采取施阻止流感的传播。

She has a theory that drinking milk prevents colds.

她有一种说法, 认为喝牛奶能防止感冒。

ConclusionUse of disposable DTL electrodes can prevent cross infection.

结论一次性DTL电极可防止交叉感染。

We were prevented by heavy smog from seeing anything.

浓雾使我们看不到任何东西。

The wood is treated with preservative to prevent decay.

这块木头用防腐剂处理过以防止腐烂。

Many interruptions have prevented me from finishing the work.

许多打岔的事使得我未能完成这项工作。

Sharp corners should be radiused to prevent arc over.

这是所有剪裁下来的片子。

Always keep food covered to prevent contamination by flies.

时常把食物盖着以防苍蝇污染。