如果你不确定如何使用仪器或操作，请向老师寻求帮助。

If you are unsure of how to use any apparatus or how to operate, ask your teacher for help.

youdao

我不确定它是否适合你，但如果你的老板很好，那也不错。

I am not sure if it'll suit you, but it's pretty cool if your bosses are right.

youdao

如果你不确定，向你信任的朋友、同事和专业人士寻求诚实的反馈。

If you're not sure, ask for honest feedback from trusted friends, colleagues and professionals.

youdao

I just want to make mention of this in case there's ever doubt, generally parentheses do solve your problem as an arithmetic but do realize this is some lower level details we'll come back to over time.

是想告诉大家如果你对某些式子的前后运算关系不确定，就加上括号,这都是一些小细节,我们以后还是会再提到的。

哈佛公开课 - 计算机科学课程节选

If you are not fixed on seeing one particular show, if you go to Leicester Square,

如果你不是确定看一场特定的演出，如果你去莱斯特广场，

廉价看音乐剧的方法 - SpeakingMax英语口语达人

All around. If you plug in the numbers, you will end up with an uncertainty 15% in the momentum as being on the order of 15%.

所有，如果你把数字都加起来，你将得到一个关于动量的不确定度,约为。

麻省理工公开课 - 固态化学导论课程节选