Fallup
n. 放射性尘埃对海洋地区的污染
🗣️ 情景例句
How well do I speak English?
我的英文说得怎样？
Why are you walking so far?
你为什么走得这样快？
Once we get down to the oil, it usually flows to the surface because great pressure,
一旦到达油层，石油就会由于地下巨大的压力流到地面上来，