以前: before; formerly; prior to; ...从前，很早以前: once upon a time很早以前: once upon a time很早以前就知道: before we knew we could一局很早以前的战报: vs akito人类很早以前就知道了武器的用处: man early learned the usefulness of weapons以前: before; formerly; prior to; previously 以前各版 all the preceding editions; 很久以前 a long time ago; 以前我没来过这里 。i haven't been here before. 这事发生在他到达以前。 it happened prior to his arrival比以前: than before从前, 以前: formerly如以前: as before以前，曾经: at one time以前的: erstwhile; fore; former; old; onetime; other; prev previous; prevenient; quondam; sometime; whilom以前留……: ever…before在以前: previously曾经，以前: once upon a time比以前少用: less often than before不久以前: a while back插入以前: xml.insertbefore()出生以前的: prenatal船中以前: afore the beam此时以前: heretofore从前，很久以前: once upon a time到那时以前: by then多年以前: all those years ago二十年以前: twenty years ago or earlier
