我能确定这不是个梦么？

Am I absolutely certain this isn't a dream?

youdao

如今我人生中最惨的一天过去已经一年了，我能确定两件事情是真实的。

As I stand here today, a year after the worst day of my life, two things are true.

youdao

如果FDA已经检查了一个人用药调制外包场所，我能确定我从这个工厂购买的药是安全的吗？

If FDA has inspected a human drug compounding outsourcing facility, can I be sure that the drugs I purchase from that facility are safe?

youdao

Things I want to make sure we all understand what they mean. Validation is a process.

我想确定我们都能明白它们的意思,验证是一个过程。

麻省理工公开课 - 计算机科学及编程导论课程节选

But I'm not sure that you can really make that assumption based on something that someone creates

但我不确定你真的能基于某人创作的某些作品来做那样的推断，

印象深刻的展示会 - SpeakingMax英语口语达人

I don't know if you can see those colors much at all, sorry about that.

我不太能确定你们是否能看清,这些颜色,不好意思

耶鲁公开课 - 美国内战与重建课程节选