So the point on the edge must rotate much faster to cover that 50 in. in 1.8 seconds than the point near the center, which has to cover less than a fifth of the distance in the same time.

因此，边缘上的点每1.8秒必须比中心的点多转50英寸，使它不得不在同样的时间里覆盖不到五分之一的距离。

youdao

The point is that for some time the center of gravity for achievement has been shifting away from the topmost colleges.

值得强调的一点就是在某段时间内，成功的重力中心从顶尖的学校发生了转移。

youdao