And now, if I'm touching mouse pointer, we saw that Boolean expression before, play sound meow, wait a couple of seconds, and then just keep checking.

现在，如果我们碰下鼠标指针，起初我们看到一个布尔表达式，播放猫叫的声音，等几秒钟，然后如刚才那样做检测。

哈佛公开课 - 计算机科学课程节选

Scratch This Boolean expression allows you to say to scratch if you are touching the mouse pointer, the little arrow, do something. How do we do something?

布尔表达式允许你告诉,当你触碰到鼠标指针，也就是小箭头，程序就相应地做一些事情？

哈佛公开课 - 计算机科学课程节选

PROFESSOR2: So it's not really a Boolean-valued function.

教授2：因此这并不是一个,真正的布尔值的函数。

麻省理工公开课 - 计算机科学及编程导论课程节选

Something that takes two inputs, a left operant - and a right operant and it just returns a Boolean value is-- or rather it returns a left to right value.

它有两个输入，一个是左边的作用物,一个是右边的作用物，然后返回一个布尔值-,或者更确切地说，返回一个从左到右的值。

哈佛公开课 - 计算机科学课程节选

It's a little more readable because I'm using a Boolean value that tells me, the programmer, this is true or this is false.

它更具有可读性一点,因为我使用了一个bool值，它告诉我或程序员，这是正确的或这是错误的。

哈佛公开课 - 计算机科学课程节选

So we talked about Mr. Bool briefly last week in this idea of true or false, but in C, you don't have a Boolean data type.

我们上周简短地谈论过Bool先生的,真假的逻辑思想，但是在C语言里，没有布尔数据类型。

哈佛公开课 - 计算机科学课程节选

That's what's called a Boolean expression named after literally a man named Boole.

这就是以Boolean这个人,的名字命名的布尔表达式。

哈佛公开课 - 计算机科学课程节选

I'm expecting the value that test to be a Boolean. Followed by a colon.

我希望测试的结果值的类型,是Boolean的，后面是个冒号。

麻省理工公开课 - 计算机科学及编程导论课程节选

Scratch The syntax actually looks reminiscent to Scratch, where you have a puzzle piece reminiscent of this shape, but you have to say "if" followed by a space, followed by in parenthesis, the Boolean expression that you want to check -- more on those in a moment.

这个语法看起来使人想起，那里有一个这种形状的程序块，但是你必须说明“if“后面跟着一个空格，跟着一个括号，一个你需要核对的布尔表达式,-还有更多的。

哈佛公开课 - 计算机科学课程节选