A regiment stayed behind to keep guard on the frontier.

有一个团留下来防守边境。

youdao

If too many workers were idle, that would bear down on prices and allow central Banks to keep interest rates low to boost spending and jobs and to guard against deflation.

如果有太多的劳动者无所事事，这将使价格降低，中央银行将保持低利率来促进就业和消费，以防止紧缩。

youdao

There are also certain ways to tell if someone is lying to help keep yourself on guard.

有一些方法能够判断某人是否说谎，让我们能提防。

youdao

City responded through Emile Mpenza heading wide as he, in contrast to the game, was tireless in his efforts to keep the Reds defence on their guard.

BBC: Man City 0-0 Liverpool

Under a system borrowed from Germany, Japanese firms must appoint at least three internal auditors to keep an eye on financial management and guard shareholders' interests.

ECONOMIST: Japanese corporate governance: No country for old men | The

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

ECONOMIST: How far should regional autonomy go?