So if you haven't already, just glance at the person next to you, or say hello if you don't know them.

如果你还没有做好，那就看看你旁边的人,如果你不认识他们就跟他们打个招呼。

哈佛公开课 - 计算机科学课程节选

And it's like, you wouldn't get these kind of opportunities if you didn't know the right people, you know.

这就是，要是你不认识对了人，你是得不到这些机会的，你知道。

认识更多人 - SpeakingMax英语口语达人

Why would anyone ever risk one's life for ? one's country or a cause just to help other people, people that we don't know and probably will never know?

为什么人人都要为自己的国家或者,去救人的缘由而冒险，并且这个人我们不认识,可能永远也不会认识？

耶鲁公开课 - 政治哲学导论课程节选

I don't like to travel with people I don't know. It's too awkward.

我不喜欢与不认识的人一起旅行，那样感觉怪怪的。

It's important 实战 - SpeakingMax英语口语达人