防盗的英文：
guard against theft

参考例句：

The guard loosed the dogs when the burglar alarm went off.
防盗警报器一响，警卫就放出了警犬。

Notice: property at these premises has been security marked
注意:该场所所有物品均有防盗标记

Chassis Intrusion
机箱防盗

Infrared burglar alarm
红外防盗报警器

Remote keyless entry system with panic feature
遥控器+防盗系统

They installed an iron gate guaranteed against robbery.
他们安装了一扇防盗铁门。

I have to safeguard my house against burglars
我不得不在家里装置防盗警铃以防窃贼。

The thieves ran away when the burglar alarm went off.
防盗警报器一响,盗贼立刻逃走了.

I have one lock but I bought another as an additional insurance against thieves.
我有一把锁，但我又买了一把作为附加的防盗保障。

Attention our merchandise has a hidden security device. Upon purchase it will be deactivated.
注意　我们的商品安有防盗装置。您只有在购买以后才可使之失效。

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

against是什么意思：
prep. 与...相反；对...不利；倚靠；以防；以...为背景；和...相比

It is against federal law to discriminate against blacks.
歧视黑人是违反联邦法律的。

She was drugged against the pain.
她服麻醉药止痛。

He informed against the drugpusher.
他告发了那个毒品贩。

theft是什么意思：
n. 偷窃；赃物

The theft was a car.
赃物是一辆车。

The theft weighed on his mind.
赃物成了他思想上很大的负担。

Do you have cover against theft?
你有防盗保险吗？