在 + Noun + 的 + 掩护 + 下 / 掩护 + Object
掩护 (yǎnhù) means "to cover" or "to provide cover for" someone, typically in a military or protective context. It can be used as both a verb and a noun, describing the act of shielding someone from danger.
你先走,我来掩护你。
nǐ xiān zǒu, wǒ lái yǎnhù nǐ.
You go first, I'll cover you.
战友们互相掩护,安全撤退了。
zhànyǒumen hùxiāng yǎnhù, ānquán chètuì le.
The comrades-in-arms covered each other and retreated safely.
他用身体掩护住了身后的孩子。
tā yòng shēntǐ yǎnhù zhù le shēn hòu de háizi.
He used his body to shield the child behind him.