访问者类有定义良好的机制方便彼此间的通信。

The visitor classes have a well-defined mechanism for communicating with each other.

youdao

这种方法的一个抽象是：使用闭包，不需要开发访问者类的层次结构。

One attraction of this approach is that with closures you do not need to develop the visitor class hierarchy.

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请考虑访问者模式，其中用for方法为复合层次结构中的每个类都定义了访问者类。

Consider the visitor pattern in which a visitor class is defined with a for method for each class in a composite hierarchy.

youdao

The worry is that those of us who are harder graders than average, if the information were published, would feel guilty and sort of ease up on our grading.

他们担心的是，我们这些更严格的评分者，在这类信息发表后，会因为内疚而稍稍把评分提高一些。

耶鲁公开课 - 死亡课程节选

There is some reason to believe that in the population known as "psychopaths," a population we'll return to later on when we discuss mental illness, this sort of instinctive empathy is broken and the pain of others just doesn't bother them very much.

我们有理由相信,在一类被称为“精神变态者“的人当中“,我们以后会继续讨论这类人,当我们讲到精神疾病时，他们就没有这种本能的移情,他们对别人的痛苦无动于衷。

耶鲁公开课 - 心理学导论课程节选