应控制摆动腿的膝角的最小角度。

The veriation of swinging leg's knee angle should be controlled.

youdao

I just go down the list selecting the smallest person at a time and then I repeat, repeat, repeat but when we actually did out the math or kind of reason through it, the running time, the asymptotic running time of bub-- of Selection Sort was also what?

只需要遍历列表，每次找出最小的元素,然后重复上述步骤，但从数学角度看,选择排序的时间复杂度,又是多少呢？

哈佛公开课 - 计算机科学课程节选