1. The driver had to stop because the density of the fog made it difficult to see.
    由于浓雾使道路很难看清，司机不得不停车。

2. The area had a population density of five people per square mile.
    该地区人口密度为每平方英里五人。

1. 浓度：调整列印浓度(density)的设定. § 感光骨(photosensitive drum)可能有刮痕. 如果是黑白雷射印表机,用另一支新的碳粉匣,如为彩色印表机,换一个新的感光滚筒(imaging drum). § 印表机的加热模组(fusing assembly)可能需要更换.

2. 比重：比重 (density) 塑胶的比重硬度 (Hardness) 一般塑胶的硬度最常用 ROCKWELL (洛式硬度)及 SHORE (萧式硬度)两种测试法来表示. 其中 SHORE A常用来测定较软之塑胶,如 TPE 等弹性体或橡胶等,SHORE D则用来测定较硬之塑胶,

3. 密度 密度：多度(abundance)是一个数量上的比率4、密度:密度(density)是指单位面积上某个物种的个体数. 8、生产量:生产量(production )是指一定空间的有机体在单位时间内生产的有机物质的重量9、频度:频度(frequency)是指群落中某物种出现的样方数占全部调查样方数的百分率.

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

    e.g. ...a law which restricts the density of housing...
           限制房屋密集程度的法规
    e.g. The region has a very high population density.
           该地区的人口密度很高。

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.

    e.g. Jupiter''s moon Io, whose density is 3.5 grams per cubic centimetre, is all rock.
           密度为每立方厘米 3.5 克的木星卫星木卫一上遍布岩石。

1. the amount per unit size

    Synonym: denseness

2. the spatial property of being crowded together

    Synonym: concentrationdensenesstightnesscompactness