Literally, return the control from this function, and take the value of the next expression, and return that as the value of the whole computation.

正如字面意义上说的，从这个函数返回，然后取得下一个表达式的值,并把这个值作为整个计算的结果返回。

麻省理工公开课 - 计算机科学及编程导论课程节选

Because in doing that, Python would then have a value that it could pass on into some other part of a computation, and if it wasn't what I wanted, I might be a long ways downstream in the computation before I actually hit some result that makes no sense.

因为如果这样做的话，Python会将,输入的值传递到下面的,一些运算中去，如果这个值的类型不是我想要的，我可能会在得到,一个毫无意义的结果之前,经历一个很长时间的,计算过程。

麻省理工公开课 - 计算机科学及编程导论课程节选