As soon as they had let the fowls out, in the early summer mornings, they had to take their guns and keep guard; and then again as soon as evening began to mellow, they must go once more.

在初夏的早晨，他们一放完鸡，就得拿起枪来站岗；等到天色渐渐柔和下来，他们又得走了。

youdao

A regiment stayed behind to keep guard on the frontier.

有一个团留下来防守边境。

youdao

All of them are kids? Why do they have got to keep guard for the kids?

都是小孩子吗？天使为什么要守着小孩呢？

youdao

She says people must keep up their guard against the virus, which is unpredictable and could change into a far more dangerous form.

VOA: standard.2009.12.29

Another one taxes businesses on the generators they keep to guard against power cuts.

ECONOMIST: How far should regional autonomy go?

Nonetheless, the United States will probably keep its guard up until Brazil establishes a clearer record in foreign policy.

ECONOMIST: Two American giants are slowly getting to know each other

But those interested in sailing frugally need to keep their guard up.

CNN: Sail the high seas on a budget