Once in a while you'll have to talk to your neighbor and say, "Can you please pass me my pacemaker that fell down?"

有时候你需要对你旁边的同学说,你能帮我捡一下我的心脏起搏器吗

耶鲁公开课 - 基础物理课程节选

He said, "If you need any help, I can help you out."

他说，“如果你需要帮助，我可以帮你“

普林斯顿公开课 - 人性课程节选

So we'll say hello to you later, if need be.

所以我将随后跟你说hello，如果需要。

哈佛公开课 - 计算机科学课程节选