参考译文:让我告诉你事实,就算是天地毁灭,在每件事情都达成之前,这个定律/法律/规律/原理,不会以任何方式有一丝一毫的改变.
I tell you the truth(主句,后面引导的是同谓语从句,解释truth) until heaven and earth disappear,(从句中的时间状语从句)not the smallest letter,not the least stroke of a pen(此为从句的主语),will by any means (by no means为方式状语)disappear(从句谓语) from the Law (from the Law为地点状语)until everything is accomplished(从句的时间状语,在这个状语里everything is accomplished又做了until这个介词的宾语,构成宾语从句).
这个句子很复杂,里面有太多的从句,从句里又有从句,主干其实就是
I tell you the truth (that) not the letter,not the stroke will disappear.