For example, some farmers in Kenya use donkeys to guard against lions and cheetahs.

VOA: special.2010.07.27

One of the things, by the way, that Eikhenbaum does in passing is remind us that we should be on our guard against thinking that sound is onomatopoetic--that is, that it reflects the meaning of what it's talking about.

艾肯鲍姆在书中提到,他特别提醒我们,不应该赞同拟声现象，拟声就是认为声音能反应它所表达的意思。

耶鲁公开课 - 文学理论导论课程节选

While clean-up continues in Louisiana,Alabama and Mississippi, officials in Florida are watching to guard against oil damage here as well.

VOA: standard.2010.07.05

The White House has promised a thorough investigation of the matter, and steps to guard against a repeat of the tragedy.

VOA: standard.2009.11.10

Sometimes they're reluctant to take part in important training such as fire safety classes and child identification programs, which guard against abduction.

VOA: standard.2010.07.22

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

The F.A.O.says that by signing the treaty, governments promise to take steps to guard their ports against ships involved in such fishing.

VOA: special.2009.12.08