我们一定要找个时间聚一下。

We must get together sometime.

《牛津词典》

如果你想去上1点的课，你可以这样做，但是一定要和我的助教安排一下。

If you want to go to class at 1:00, you're welcome to do so, but please arrange it with my assistants.

youdao

你出去之前一定要收拾一下。

You should tidy up before leaving.

youdao

As I say, the syllabuses should be accessible on the Classsv2 server; however, I've had problems with that in the past and you should please let me know if it's not.

你们可以在2号课程服务器上下载大纲;,不过我曾经下载不了,如果现在还不能下的话，一定要告诉我。

耶鲁公开课 - 现代诗歌课程节选

We will be talking about papers in the section.It will be helpful to you it will also give you a chanceto talk about these books so please do go.

我们下节课会讨论你们的论文，这对你们很有用,也给你们机会讨论这些书，所以请你们一定要来。

耶鲁公开课 - 1945年后的美国小说课程节选

Can you tell us a little bit about Outdoor Action and a little bit of how you came to this conversation, because we decide to collaborate on something.

你能否给我们简单介绍下这个项目,也谈一谈你为什么要来这个讲堂，我想我们一定会有一些共同点。

普林斯顿公开课 - 人性课程节选