r. to an exceedingly great extent or degree
adv. 广大地, 许多, 巨大
1. The new policy will vastly improve the quality of education.
新政策将大大改善教育质量。
2. She vastly underestimated the time needed to complete the project.
她大大低估了完成这个项目所需的时间。
3. The city has vastly changed since I last visited.
自从我上次拜访以来，这座城市已经发生了巨大的变化。