It is impossible to defend against an all-out attack.

防御全面进攻是不可能的。

《牛津词典》

A family must defend its home against attack.

一个家庭必须保护其不受袭击。

youdao

There is also a castle in Europe with defenses set to defend against an attack from the inside out.

欧洲还有一处城堡其防御设施是用于防御来自地内的攻击。

youdao

He stopped moving forward and prepared to defend against what seemed to be a strong Confederate attack.

VOA: special.2009.08.27

Defense Minister Ahmed Vahidi says the Sejil 2 is intended to defend the country against outside attack.

VOA: standard.2009.12.18

Villagers in the Pakistani part of the region are being armed with rifles and supplied with radios to defend themselves against attack.

ECONOMIST: India and Pakistan

This compliance extends not only to the literal obligation not to produce and possess offensiveessentially no capability to defend against biological attack by others.

CENTERFORSECURITYPOLICY: Center for Security Policy | Submitted Testimony Of Frank J. Gaffney, Jr. Before A Joint Hearing Of The Senate Governmental Affairs Committee And The Permanent Subcommittee On Investigations

Christophe Duverne, a spokesman for NXP, told Reuters that it would take months or years for some users of the chip to adapt their systems to defend against the attack.

BBC: Oyster cards, PA