如果表达式为true，节点就添加到结果中。

If the expression is true, the node is added to the results.

youdao

如果表达式产生多个节点，则仅使用第一个节点。

If the expression results in more than one node, then only the first node is used.

youdao

如果表达式读到true，则数据将成功通过过滤器。

If the expression reads true, the data will come through the filter.

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

What I have now is the following: I can write expressions, do combinations of things to get out values, I can store them away, I can print them up.

我已经讲过如下内容：,如何写表达式，如果把东西混合然后得到结果值，我可以将其保存，也可以将其显示。

麻省理工公开课 - 计算机科学及编程导论课程节选

If you have not seen the calculus that I'm about to use on the board, or more likely, if you've forgotten it since high school, don't panic.

如果你们没有见过我将要,在板书上写的表达式,或者说,高中毕业你们就忘了,没关系

耶鲁公开课 - 博弈论课程节选