He or she then blows through the pipe so that the glass expands into a rounded bubble form.

VOA: special.2009.09.16

So Selection Sort, while it might be easier perhaps to think through than Bubble Sort, or maybe it's pretty much equivalent, it's just a different approach to the same problem.

因此，仔细想想，选择排序也许比,冒泡排序更简单，或者这两者都差不多，只是对同一问题的不同方法而已。

哈佛公开课 - 计算机科学课程节选