Once each time. Right? I only do one swap potentially, it-- though not one potentially, each time at the end of the loop I do a swap.

每次循环做一次，对么？我其实,就可能做了一次交换，也许并不是可能，每次循环的结束我都得做一次交换。

麻省理工公开课 - 计算机科学及编程导论课程节选

In the second case, I found in the next smallest element and moved here, taking what was there and moving it on, in this case I would swap the 4 and the 8, and in next case I wouldn't have to do anything.

在第二次遍历中，我找到了,第二小的元素，把它移到这里,把这里原来的元素移到哪里,在这一次遍历中，我会把8和4交换,然后一次遍历，不会做任何事情。

麻省理工公开课 - 计算机科学及编程导论课程节选

So in the first case, I didn't have to do any swaps because 1 was the smallest thing.

所以在第一次遍历中，我没有做,任何的交换因为1就是最小的。

麻省理工公开课 - 计算机科学及编程导论课程节选