名詞 expanse:

1. a wide scope
   同義詞：sweep
2. the extent of a 2-dimensional surface enclosed within a boundary
   同義詞：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.
   太空地球大氣層以外的空間部分
2. A broad, level, open expanse of land.
   原野，曠野一寬廣的、水平的、開(kāi)闊的土地
3. There was a great expanse of desert before us.
   我們面前有一片廣闊的沙漠。
4. The Pacific Ocean is a vast expanse of water.
   太平洋是一片廣大的水域。

ex.panse

n.（名詞）
A wide and open extent, as of surface, land, or sky.
廣闊：廣闊的水面、陸地或天空

Expansion.
廣闊
The distance or amount of expansion.
擴(kuò)展的數(shù)量或距離

來(lái)源：
Latin exp3nsum [from neuter past participle of] expandere [to spread out] * see expand
拉丁語(yǔ) exp3nsum [] 源自expandere的中性過(guò)去分詞 [展開(kāi)] *參見(jiàn) expand