But if it is not, it's going to print out a message here saying, you screwed up, somewhat politely, and it's going to go back around. So it'll just cycle until I get something of the right type.

但是输入不是浮点数的话,我这里就会显示一个消息说，你搞砸了，该稍微有点礼貌吧？,然后我们继续执行循环,一直到得到正确类型的输入。

麻省理工公开课 - 计算机科学及编程导论课程节选

You want to ask to use the restroom as politely and as softly as you can.

你想要尽可能礼貌委婉地请求使用洗手间。

I wonder if 课堂 - SpeakingMax英语口语达人