While requires the condition to be a Boolean and!

而需要的条件是一个布尔和！

youdao

These two query restrictions are combined in this query by using the Boolean AND operator.

可以通过使用Boolean AND操作符将这两个查询限制组合在该查询中。

youdao

However, the same cannot be said about fn: Boolean and xs: Boolean, which differ in how they treat strings.

但是fn： boolean和xs： boolean与此不同，这两个函数以不同的方式处理字符串。

youdao

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

And this puzzle piece here colored in blue because it's a Boolean expression is just something that--whose answer is either a yes or no, 0 true or false, one or zero.

这个拼图染成蓝色,因为它是布尔表达式,它的结果只可能是肯定或否定，对或错，1或者。

哈佛公开课 - 计算机科学课程节选

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

All that began to had began to change a century or so ago with the discovery of Boolean algebra and the construction of the first modern computing machines.

FORBES: Computing Desire