来玩一玩砸袋子的游戏吧！

Play a game of beanbag!

youdao

没有谁会给自己也没有把握能成功的东西砸这么多的钱吧，对不对？

Nobody would invest so much money in something that wasn't sure to be a success, right?

youdao

大约30秒后，我醒悟了过来，意识到，我是在搬石头砸自己的脚，对吧？

And about 30 seconds later, I came to my senses and I realized that I had done exactly the wrong thing, right?

youdao

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