Life is thought to need both water and the right chemicals to guarantee survival.

VOA: special.2010.05.25

There are critics of Fannie and Freddie who say, the government guarantee doesn't sound right because why is the government guaranteeing a private company?

房利美和房地美的评论家们认为,政府担保听起来有点不对劲,政府为何要担保一个私人企业呢

耶鲁公开课 - 金融市场课程节选

So I can guarantee I've got something of the right type.

因此我能保证得到的,是正确的类型。

麻省理工公开课 - 计算机科学及编程导论课程节选