adv.极大地；广大地；巨大地
His father was vastly pleased with him. 他父亲对他极为满意。
His piano playing has vastly improved since last year. 自去年以来他的钢琴弹奏技巧有了极大的改进。
The power and influence of even the present-day Internet is vastly underestimated. 即使是现今的网络的重要性与影响力都是被广泛低估了。
