我想念女朋友，因为我感到有人需要我。

I miss my girlfriend because I felt then someone needed me.

youdao

不过我知道总有一天我可以开业做老年医疗工作，我知道这里有人需要我的帮助。

But I know someday I will be able to do my geriatrics practice, and I know there are people here who need my help.

youdao

我感觉自己很重要，有人需要我，这种感觉就像在我们交往过程中，我是同等重要的。

I felt important and wanted, like I was a real equal in our relationship.

youdao

All right, so someone's going to take advantage of me, but even more than that, an even stronger argument: that's true, but even a stronger argument.

这样有人就会从我身上得到好处,这还不够,我需要更充分的理由,这说得对 但我要个更充分的理由

耶鲁公开课 - 博弈论课程节选

In other words, the person wants to ask, "How much i prime and how much j prime do I need to build up the vector A?"

换句话说,有人会问,"我需要用多少倍的 i' 和多少倍的 j',来组成矢量 A"

耶鲁公开课 - 基础物理课程节选