" There is no need to stand guard over him anymore, Dumble-dore! " she shrieked.

“已经没必要看守他了，邓布利多！”她尖声嚷道。

" And some of them are standing guard over something, " said Ron, " They're always talking about guard duty."

“还有些人正在为什么事情站岗放哨，”罗恩说，“他们一直在谈论什么警卫任务。”

You must stand guard over him at all times.

【stand】你必须随时看管着他。

The whole idea of Sentinel is that we all stand guard over each other.

PS：Sentinel 的整体理念是我们都互相守卫。

Under siege by the Nazis, and with Vavilov stuck in prison, they moved hundreds of boxes to a freezing basement and took turns standing guard over their trove of genetic diversity.

在纳粹的围攻下，瓦维洛夫被关在监狱里，他们将数百个箱子搬到了冰冷的地下室，并轮流看守他们的基因多样性宝库。