expanse

名词 expanse:

1. a wide scope
   同义词：sweep
2. the extent of a 2-dimensional surface enclosed within a boundary
   同义词：area, surface area
3. a wide and open space or area as of surface or land or sky

1. The region of this expanse beyond Earth's atmosphere.
   太空地球大气层以外的空间部分
2. A broad, level, open expanse of land.
   原野，旷野一宽广的、水平的、开阔的土地
3. There was a great expanse of desert before us.
   我们面前有一片广阔的沙漠。
4. The Pacific Ocean is a vast expanse of water.
   太平洋是一片广大的水域。