Rarefication
n. 变稀薄, 稀薄
🗣️ 情景例句
Grandpa really loves his family, doesn't he?
爷爷确实很爱这个家， 是吗？
Riches do not always bring happiness.
富未必永远带幸福。
and the search for oil has done more to improve deep drilling than any other mining activity.
寻找石油比其他任何采矿业对改进深孔钻探作的贡献都要大。