"After reviewing many terrific candidates, I am certain that she is the right choice,".

VOA: standard.2009.05.30

And I get down to a certain card and I am stumped, so I will leave a space waiting for that card to appear on cue.

我遇到某张牌,会被困住，我会留些地方给,恰好要出现的牌。

麻省理工公开课 - 固态化学导论课程节选

I am certain we would know that George Washington was the commander of our forces in our battle.

我十分确信你们都知道,乔治·华盛顿是战时美国军队的指挥官

耶鲁公开课 - 古希腊历史简介课程节选