传染病方面，今年我们有过伤寒，两年前，有过疹子，有时多到百来个病人，我们真不知道怎么办。

In case of epidemics, — we have had the typhus fever this year; we had the sweating sickness two years ago, and a hundred patients at times, — we know not what to do.

youdao

几乎可以确定的是，今年第三和第四季度的产出将下降，我不知道之后会如何演变。

It's almost certain that output will fall in both the third and fourth quarters of this year, and I don't know where it will go after that.

youdao

我不知道他们今年卖了多少辆。

I don't know how many they're selling this year.

youdao

So, you may or may not know this about your TAs, but this is a pretty competitive group of TAs we have this year, and they like to brag about how smart their recitation is, how good questions they're getting in the recitation section.

不知道你们是否知道这与你们的助教有关，但是今年我们的助教们,都非常有才，而且他们都想向别人炫耀一下，自己的讨论课做得有多漂亮，回答的问题有多好。

麻省理工公开课 - 化学原理课程节选

I don't know. I have got to see some of the shows at Fashion Week this year.

我不知道。我得去看看今年时装周的展示 。

喜欢的设计师 - SpeakingMax英语口语达人