So, last date we were looking at some early taxonomy, and then on to a little bit more about the interior of the atom.

因此，最近我们了解了一下早期的分类法，以便加深,对原子内部的理解。

麻省理工公开课 - 固态化学导论课程节选

Now, you have to understand that when you buy a bond, if you buy it at issue, you get the first coupon in six months, the second coupon in one year, the third coupon in eighteen months, and the last coupon you get at the maturity date.

你们需要了解,如果在发行时就购入债券,六个月后会得到第一笔票息,一年后第二笔,18个月后第三笔,到期时得到最后一笔票息

耶鲁公开课 - 金融市场课程节选