adv.极大地;广大地;深远地;
例句:
...cars that are vastly more competitive.
更富竞争力、优势极为明显的汽车
Stents have been vastly applied in interventional surgery.
在介入治疗法中,经常需要植入支架.
Her private and public selves were vastly different.
她人后的本相与人前的形象大为不同.