Thomas R. Dew, a very important pro-slavery writer, who wrote a whole book in the wake of the state of Virginia's debates in 1831 and '32 over whether to re-write its Constitution.

托马斯·德夫,一个非常重要的亲奴主义作家,曾在弗吉尼亚州于1831和32年开展的,关于是否重写其宪法的辩论之后,撰写过一本书

耶鲁公开课 - 美国内战与重建课程节选

If you want to write it as a vector equation, you want to write it as v square over r minus-- I want to say that it's pointing in the direction toward the center.

如果要写出矢量方程,就应该写成 -v^2 / r,也就是说,方向就向圆心

耶鲁公开课 - 基础物理课程节选

So, we can just plug it in. Speed is equal to the distance traveled, which is lambda over the time elapsed, which is 1 over nu. so, we can re-write that as speed is equal to lambda nu times nu, and it turns out typically this is reported in meters per second or nanometers per second.

经过的距离和所花的时间,我们把它们带进来,速度等于经过的距离,也即是lambda除以,所花的时间,通常它的单位,是米每秒或者纳米每秒。

麻省理工公开课 - 化学原理课程节选