戒备的英文：
to take precautions
to guard against (emergency)

参考例句：

A defense mechanism.
戒备的心理状态

The Special Duties Unit was deployed to counter any potential threats.
特警队也奉召到场戒备。

Alert and watchful;cautious.
谨慎的警觉且戒备的;谨慎的

To be kept in strict solitary confinement, and to be closely watched and guarded
应严加看守，小心戒备。

We should stand by on a hurricane alert .
在暴风雨警戒期间我们应加戒备。

Suddenly we hear the shriek of unwary animal take by surprise.
突然我们听到了无戒备的动物遭突袭的尖叫声。

Suddenly we heard the shrieks of unwary animals taken by surprise.
突然我们听到了无戒备的动物遭突袭的尖叫声

At first his jealousy only showed in small ways.
起初他的戒备表现得不是十分明显。

The murderer crept up on his unsuspecting victim.
那个杀人凶手悄悄逼近毫无戒备之心的受害者.

The dog jealously guarded its Bone.
那狗戒备地看管着它的骨头。

take是什么意思：
v. 拿，取；带；获得；采取；承担；吃；耗费；乘，搭；以为；理解；走；抓住

a catch; a take; a taking
捕获量

take a nap; take a snooze
小睡一下;睡午觉

take service with
在￥帮佣

precautions是什么意思：
n.[C]
1.预防措施或方法

I took an umbrella as a precaution.
我带了一把伞以防下雨。

All this woke the local government to the need for safety precautions.
所有这些使当地政府认识到必须采取安全预防措施。

We have taken necessary precautions against fire.
我们已采取必要的防火措施。

guard是什么意思：
n. 卫兵；护卫队；守卫；警戒；防护装置；列车长
v. 看守；监视；控制；防范

guarding position
防守位置

a guarded answer
谨慎的回答

...the Irish Guards
...爱尔兰近卫团