valid program的意思|示意

It might be very difficult to ensure that an aspect implemented for very valid reasons does not have unwanted effects on existing program functionality.

要保证一个为非常有效推断所实现的方面不会对现存程序功能带来多余的效果是非常困难的。

If there are no errors in the server program, the forward is valid; if there are errors, it will be invalid.

如果服务器程序中没有错误，那么转发就是有效的；如果有错误，那它就是无效的。

This is a valid program that is required to run at startup.

这是一个合法的进程，它会要求在启动时运行。