density

/ˈdɛnsɪti/

the amount per unit size

中文释义：密度；浓度；稠密

The population density in urban areas is much higher than in rural regions.

城市地区的人口密度远高于农村地区。

The density of the material determines whether it will float or sink.

材料的密度决定了它是浮还是沉。