例句：

　　您肯定碰到過(guò)這種情形，有人叫您不要做某事，因為它是 “沒(méi)有先例的行為”，或者您真的不需要了解內幕。

　　You know all those times people have told you not to do something, because it's "undefined behavior", or that you don't really need to know the internals?

　　告訴人們，請人，命令，并遵循做某事…如果消極的迫切需要，不要做后面的行。

　　Tell people, please people, order, and followed to do STH... If the negative imperative, not to do behind the line.