It stands guard at the boundary between the known and the unknown, because in order to discover something truly new, at least one of your basic assumptions has to change, and that means that in science, we do something quite heroic.
它守卫着已知 和未知之间的边界， 因为为了获得真正的全新发现 你得至少改变一个基本假定， 那也就意味着在科学上， 我们会做一些很壮烈的事情。