gas sand的用法和樣例：
例句
- The atmosphere is rich in natural gas.
這個氣層的天然氣儲量很大。 - Dynamic analysis of gas formation revealed that the resisting force for the capillary tubes in the Upper Paleozoic reservoir was so high that it prevented the remigration of gas.
含氣範圍內的同一氣層連通性較差，氣水分佈受區域構造控制，局部明顯存在邊底水，也沒有整體活塞式氣驅水作用形成的區域性氣水界面。
