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

如果表达式为true，节点就添加到结果中。

youdao

The while loop, which executes a block of statements as long as a test expression is true.

while循环，它当一个测试表达式为true时执行一个语句块。

youdao

If the evaluation of the test expression is true and does not result in a dynamic or type error, the element is considered locally valid.

如果测试表达式的计算结果为true并且没有导致动态的或类型错误，那么则认为元素在逻辑上是有效的。

youdao

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

Though the French philosopher, Voltaire, and Uncle Ben from Spiderman have both spoken these words, this expression is especially true of social media.

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