If we were to take the strict position of "never break existing code," we would be forced to reject this useful new feature.

如果我们有严格地立场，“从不破坏现有代码”，那么我们将被迫拒绝这项有用的新功能。

youdao

This means that a variable may reject attempts to set its value to something malicious or simply nonsensical by referring to a regular expression (or even a piece of code).

这意味着通过引用正则表达式(或者甚至是一段代码)，变量会拒绝将其值设置为某些恶意的值或完全无意义值的尝试。

youdao

Initially, writing this code can be a little dreary, but it also has a real advantage in reliability: many mysterious problems instantly disappear if you immediately reject bad data.

在开始时，编写这些代码可能会有一点无聊，不过它对于可靠性确实有好处：如果您拒绝了那些非法数据，许多不可思议的问题马上就会消失。

youdao