guard against

We were guarded by sentries against surprise attack.

我由哨兵守卫, 以免遭受突袭。

Miners wore a helmet as a guard against falling rocks.

矿工头戴钢盔, 防护落下岩石。

Be on your guard against pickpockets.

谨防扒手。

Be on your guard against thieves.

心小偷。

In scientific discussions it is essential to guard against subjectivism and arbitrariness.

在科学讨论中严防主观武断。

Be guard against various sham theories. Don't be fooled by them.

"警惕各种假理论,不上它/不为它所欺骗。"

You must guard against those who fawn upon you and bow obsequiously before you!

阿谀奉承、点头哈腰格外警惕!

He guarded himself against vice.

他避免染上坏习惯。

A 20-mile exclusion zone was set up around the power station to guard against further explosions.

发电厂周围设立了20 英里禁区以減低再度爆炸造成影响。

So the instrument not only convenient for mineworker, but effective guarded against the fire damp explosion in practice ap...

在实际应用中不但方便了井下工随身携带,而且有效地预防了安全事故发生。