来自拉丁语vastus,荒废的，空无的，引申词义辽阔的，无垠的，词源同vain,waste.

1. In the cities vast crowds have been demonstrating for change.

在城市里，大批的人群举行示威游行，要求进行变革。

2. Portugal and Spain had possessed vast empires that waxed and waned.

葡萄牙和西班牙都曾是经历了兴衰的大帝国。

3. This vast archive has been indexed and made accessible to researchers.

这个存量巨大的档案室的所有文件都已编了索引，可供研究人员使用。

4. The pollution has already turned vast areas into a wasteland.

污染已经使大片地区沦为不毛之地。

5. Compact discs have brought about a vast improvement in recorded sound quality.

激光唱片极大地提高了录音的音质。