检查后，露西很生气：“胃疼得厉害！塞纳托尔怎么会这么快就重了两磅？”

After the examination, Lucy was angry, "A terrible stomachache! How could Senator have such a rapid two pounds in weight?"

youdao

县令问王是怎么回事，王回答说：“一年前给我的时候，周说这罐子里有新鲜的红枣。”县令仔细地检查了坛子和里面新鲜的红枣。然后他说：“王五，把金锭拿回来！”县令是怎么推断王在撒谎的？

When the magistrate asked Wang what had happened, he answered, "Zhou said that there were fresh red dates in it when he gave me the jar a year ago." The magistrate examined the jar and the fresh red dates in it carefully. Then he said: "Bring the ingots back, Wang Wu!" How did the county magistrate infer that Wang was lying?

youdao

又或者，即使你做了这种检查，你也不知道究竟会怎么样……

Or perhaps, even if you do check, you'll still never know...Gulp.

youdao

It tells you how you might test something but it doesn't tell you how to.

它告诉你怎么才可能去检查一些事儿,但是它没有说怎样检查。

麻省理工公开课 - 计算机科学及编程导论课程节选

I test an end test. So the flow chart says, and the tradition was to do this in a diamond shape, I'm going to check if ANS times ANS-- oh, which way did I want to do this x - is less than or equal to x. Now that's a test.

首先进行终结测试，因此流程图就的去,传统的做法是把这个放到一个菱形里面,检查下是否ANS乘以ANS-哦,我刚才是怎么说的来着-是不是小于等于。

麻省理工公开课 - 计算机科学及编程导论课程节选

But notice what this does. The first thing it does is, it says, let's check and make sure x is greater than or equal to 0. If it isn't, notice what's going to happen. None of that block is going to get executed, and it's going to come down here and print out a useful piece of information, which says, hey, you gave me a negative number. I don't know how to do this.

做的是和以前一样的事情,但是注释它做了什么，第一件做的事情就是,程序说，要去检查并且确信x是大于等于0的，如果不是的话，请注意会发生什么,下面的代码都不会被执行,程序会到这里来然后显示一些有用的信息,信息会说，嘿，你给了我一个负数,我不知道该怎么弄这个了。

麻省理工公开课 - 计算机科学及编程导论课程节选