relative biotic density index相对生物密度指数的
relative optical density相对光密度;相对光密度值
relative vertebral density相对脊椎密度
relative population density test相对菌丛密度试验
maximum relative specific density最大相对密度
relative root density相对根密度
relative current density相对即时密度
Relative Mean Density相对密度
relative radiation density相对辐射密度
The sample prepared at 300℃under the pressure of 6GPa is 40-50nm in size and relative density 99%.
300℃、6GPa 制得了晶粒尺寸 40-50nm,相对密度大于 99%的 ZnO 纳米块体。
The density of open-cell Fe-Ni foam is in the range 0.2g/cm~3～1.2g/cm~3 and the relative density is 2.3%～12%.
泡沫Fe-Ni材料的密度为0.2g/cm~3～1.2g/cm~3,致密度为2.3%～12%。
参考来源 - 泡沫FeOf all the binders used,the tape fabricated with 20wt%PVA+80wt%B-1070 has high green density. After sintering at 1600℃for 2h,the relative density of 96Al2O3 substrates was above 97%（3.73g/cm3）.
以复合粘结剂20wt%PVA+80wt%B-1070为粘结剂的流延素坯在1600℃保温2小时烧结能获得相对密度达97%以上（3.73g/cm3）的96Al2O3基片。
With increasing of TiB2 content in the original powder system, liquid sintering decreases, and the relative density, bending strength and fracture toughness of the products are increased.
随着TiB2含量增加，液相烧结作用增强，产物致密度提高。
参考来源 - 无包封燃烧合成气相热等静压AlNFor Fujian standard sand, using the dry sampling method and water pluviation method, controlling the initial relative density 50%, the initial surrounding pressures 100,200, and 300kPa, consolidated drained tests are studied.
针对福建标准砂,采用干装法和水下沉积法制备试样,控制初始相对密实度为50%,初始固结围压分别为100、200、300kPa,进行了三轴固结排水剪切试验。
参考来源 - 成样方法对饱和中砂静力三轴试验结果的影响N（名词） the ratio of the density of a substance to the density of a standard substance under specified conditions. For liquids and solids the standard is usually water at 4°C or some other specified temperature. For gases the standard is often air or hydrogen at the same temperature and pressure as the substance 相对密度 ( symbol: ) → see also specific gravity, vapour density