Are you sure he was lying? I can't believe that of him.

你确信他在说谎吗？我不相信他会干这种事。

《牛津词典》

Listen, Lamp-Wick, said the Marionette, are you really sure that there are no schools in the Land of Toys?

“听着，小灯芯，”木偶说，“你真的确定愚人国里没有学校吗？”

youdao

I feel sure that in terms of qualification, ability and experience, you are absolutely suited to the position we have in mind.

我确信就资历、能力和经验而言，你是做这份工作最合适的人选。

youdao

OK, important -- if you are part of this group here think about it and make sure you understand that.

好的，这很重要，如果刚才你选了可逆过程,请好好想想并且保证已经理解了这个问题。

麻省理工公开课 - 热力学与动力学课程节选

No, I'm sure you'll get dangerous moments if you are going to go into war and all that kind of thing, but.

不，我相信如果你去战场，那时所有的事情都会很危险。

英国的军人 - SpeakingMax英语口语达人

These are just little things that can add up, so you just want to make sure you're on top of those.

这些小事情也会影响到你的总分，因此务必熟练掌握。

麻省理工公开课 - 化学原理课程节选

Make sure that your policy does not include a clause excluding payment in the event that you are killed in the line of duty, and be sure that you are protected in the event of a traumatic injury.

FORBES: Make a Legal and Financial To-Do List Before Military Deployment

When you are purchasing leads outright, you need to make sure that you are purchasing the right kind of leads, which are going to have a higher close rate.

FORBES: Lessons in Lead Valuation From Facebook's Acquisition Strategy

The big concern is that you are opening yourself up to a tremendous amount of risk and you want to make sure that you are comfortable with it.

FORBES: Options Straddles Can Score You Touchdowns Or Get You Sacked