守备

wǒ yǒu shǒu bèi rèn wù

我有守备任务。

I have a garrison duty.

jiā qiáng shǒu bèi

加强守备

strengthen the garrison

zhè wèi xuǎn shǒu zài shǒu bèi wèi zhi

这位选手在守备位置。

The player was in position.