It didn't-- if you needed more time to get some business done you'd have to borrow, but you'd only have to pay 1% a year.

如果你需要更多时间来完成业务,你需要借款,而只需付1%的年利息

耶鲁公开课 - 金融市场课程节选

So, our bodies are capable of making antibodies that are tuned for all the potential antigens that we come into contact with, That's amazing that we have this capacity to respond and you respond only when needed.

所以 我们的身体具有制造抗体的能力,这些抗体对于各种潜在抗原具有特异性,我们具有只在需要时做出,免疫反应的能力 这太让人惊叹了

耶鲁公开课 - 生物医学工程探索课程节选

So, it turns out that n is not the only quantum number needed to describe a wave function, however. There's two more you can see come out of it.

事实上，n不是描述一个波函数需要的,唯一的量子数，你们可以看到，还需要，两个量子数。

麻省理工公开课 - 化学原理课程节选