n.宽阔的区域
The region of this expanse beyond Earth's atmosphere. 太空地球大气层以外的空间部分
A broad, level, open expanse of land. 原野，旷野一宽广的、水平的、开阔的土地
There was a great expanse of desert before us. 我们面前有一片广阔的沙漠。
