They summoned men to defend their country.

他召集男来保卫国家。

We must defend our motherland from the enemy.

我必须保卫祖国防御进犯之敌。

We are determined to defend our motherland at all costs.

我决心不惜任何代价保卫祖国。

The general detached a small force to go and guard the palace.

将军派遣一支小部队去保卫宫殿。

It is obligatory on every citizen to safeguard our great motherland.

保卫我的祖国是一公民尽的义务。

The protection of the country is the duty of everyone.

保卫国家是的责任。

We fought shoulder to shoulder to defend our country.

我并肩战斗保卫祖国。

To access food sources or defend the territory,agonistic behavior,mostly in a form of ritualization,was frequently displayed.

为获得食物和保卫领域，黑颈鹤之间(或与灰鹤之间)常发生争斗，争斗的主要形式是仪式化威胁。

North American Aerospace Defense Command (NORAD) - a binational command involving the United States and Canada which provides warning of missile and air attack against both of its member...

北美航空防御指挥部-美国和加拿的联合指挥部，提供导弹发射和空袭的警报，保卫北美领空，并提供空中防御。