n.巨大；廣闊；廣袤
The vastness of London amazed him. 倫敦廣闊的面積使他驚奇。
Observation was enabled to compass its vastness. 觀察力卻能夠看透廣闊的空間。
The vastness of space really boggles the mind. 太空之遼闊的確使人難以想像。
