时间银行主要是一种以个人为基础的时间交换，存借双方经过配对，实现互助。

The time banking is primarily based on personal time exchange. The two sides, depositor and borrower, are matched to help each other.

youdao

如果在贵公司或者是贵公司所在的地区有在节假日或任何其他时间交换礼物的做法，我希望贵公司按照下面的原则来了解什么样的行为对于我们来说是可接受的。

If it is the practice in your company or in your region to exchange gifts around the holiday season or at any time, I would like to draw your attention to guidelines below as to what is acceptable.

youdao

学生志愿者贡献自己的时间来帮助交换生。

The student volunteers contributed their own time to helping exchanged students.

youdao

And so if you are a bit of a geek and would like to play net/aces with this you can go to cs50.net/aces and I don't think Willie will give it to you to keep but you can borrow and play for some amount of time in exchange for some feedback on it.

所以，如果你有兴趣并想玩玩这个,那么你可以访问cs50。,但是我觉得Willie不会让你保管它,你可以去借，然后玩一段时间，但作为交换条件,你需要反馈一些意见。

哈佛公开课 - 计算机科学课程节选