名词

1. 密度;稠密;密集
Density is the extent to which something is filled or covered with people or things.

2. （物质或物体的）密度
In science, the density of a substance or object is the relation of its mass or weight to its volume.

1. the amount per unit size

Synonym: denseness

2. the spatial property of being crowded together

Synonym: concentrationdensenesstightnesscompactness