Densities
n. 密集( density的复数形式 ); 稠密; <物><化>密度（固体、液体或气体单位体积的质量）; 密度（磁盘存贮数据的可用空间）
🗣️ 情景例句
How about a date with your grandfather?
和你爷爷约个会好吗？
Who is it? Come down.
是谁？下来。
The need to produce ever-increasing quantities of cheap food leads to a different kind of pollution.
日益增长的对廉价食物的需求导致了另一种形式的污染。