density

1. N-VAR Density is the extent to which something is filled or covered with people or things. 密度

The region has a very high population density. 這一地區(qū)人口密度很高。

2. N-VAR In science, the density of a substance or object is the relation of its mass or weight to its volume. 密度[技術(shù)]

Jupiter's moon Io, whose density is 3.5 grams per cubic centimetre, is all rock. 木星的衛(wèi)星木衛(wèi)一全是巖石，其密度為每立方厘米3.5克。