The reason they call them coupons is that, in the old days, you used to actually--when you bought a bond, there would be a piece of paper and the piece of paper would have attached to it a lot of little coupons that you would clip.

这里被称作"票息"的原因是,在过去,当你买了债券的时候,会有一张纸,那张纸上附带了许多,你能剪下来的小纸票

耶鲁公开课 - 金融市场课程节选

So again, we can name these molecular orbitals and these we're going to call also to point out there is now a bond axis along this nodal plane, which is something we didn't see before when we were combining the s orbitals.

同样的，我们可以,命名这些分子轨道,这些轨道叫做-同样要指出的是,现在沿着键轴是一个节点面，这是我们讨论s轨道的时候,从没有看到过的。

麻省理工公开课 - 化学原理课程节选