密度的英文：
density
thickness

参考例句：

The density logger consists of a radiation source
密度测井仪包括辐射源。

Antigen density on the tumor cell surface influences the cytotoxic sensitivity
瘤细胞表面的抗原密度影响细胞毒的敏感性。

The product of the velocity and density of a rock is termed in the acoustic impedance.
岩石的波速和密度之乘积称为声波阴抗。

The fact is that small density perturbations or departures from perfect homogeneity, are unavoidable in such a medium
小的密度扰动或对理想均匀性的偏离在这样的物质中不可避免。

annual ring density
年轮密度

Total floor space per hectare plot
建筑面积密度

Air has little substance.
空气的密度很小

Irradiance, E
辐射通量密度,E

density proportional
与密度成比例的

Medium density fibre Board (MDF)
中密度纤维板

density是什么意思：
n. 密集，稠密；密度

annual ring density
年轮密度

They will study the density of the stub.
他们会研究树桩的密度。

The entropy density is constant ahead of the shock.
冲击波前方的熵密度是恒定的。

reflectivity depends on the velocity and density of rocks
反射能力取决于岩面的速度和密度。

about 1/4 the normal hair density
大约为正常茸毛密度的

thickness是什么意思：
n. 厚度；浓度；层

thick cream; thick soup; thick smoke; thick fog.
稠的奶酪；浓汤；浓烟；浓雾。

thickness dummy
装帧样本

flange thickness
轮缘厚度

One thickness of cotton wool and two thicknesses of felt
一层棉絮及两层毛毡.

Blanket thickness gauge: An instrument for measuring the thickness of a blanket.
胶布厚度计:量度胶布厚度的仪器。