密度 1.(密集的程度) density; thickness 火力密度 density of fire; 兵力密度 density of troops; 那个国家的人口密度为每平方英里685人。 the population density of that country is 685 per square mile.2.[物理学] (物体的质量和其体积的比值) density 电流密度 current density; 海水密度 seawater density; 水银的密度比水大得多。 mercury has a much greater density than water.; 密度计 densimeter; densitometer; density gage; density indicator; gravitometer
Methods of test for masonry units - part 13 : determination of net and gross dry density of masonry units except for natural stone ; german version en 772 - 13 : 2000 圬工品试验方法.第13部分:圬工品湿密度和干总密度测
If the density of matter and energy in the universe is less than the critical density , the space curvature will be negative 事实上,宇宙中暗物质和暗能量的多寡决定了宇宙的几何结构。假若宇宙中的物质和能量的总密度低于临界密度,它是一个空间曲率
Bivalve density in east tangsun lake was maximal while that in niushan lake and longgan lake were minimal . insect density in east tangsun lake was maximal but that in huang lake was minimal , and the differences of them among three lakes were distinct ( p 0 . 05 ) . zoobenthic density in east tangsun lake was maximal but that in huang lake was minimal , and the difference in two lakes was distinct ( p < 0 . 05 ) 在密度方面,寡毛类以龙感湖最高,牛山湖最低,且两湖差异显著( p 0 . 05 ) ;牛山湖螺类明显比其它三个湖湖泊高( p 0 . 05 ) ;双壳类以东汤孙湖最高,牛山湖和龙感湖最低;水生昆虫以东汤孙湖最高,黄湖最低,且东汤孙湖与龙感湖和黄湖差界显著( p 0 . 05 ) ;底栖动物总密度以东汤孙湖最高,黄湖最低,且两湖差异显著( p 0 . 05 ) 。