The surface density of galaxies in a cluster can be measured from photographs.
一个星系团中星系的表面密度可从其照片上测得。
The surface density of cracks increases with the increasing of the degree of pre-damage.
随着预损伤程度的增加，裂纹面密度增大。
Objective: To explore the post-operative change of blood flow and surface density of vascular network of the pure venous flap.
目的：观测纯静脉皮瓣术后血流量和血管网面密度变化。
It begins with Maarten Schmidt who hypothesized that star formation rate (SFR) was related to the surface density of atomic hydrogen gas in the cloud.
最早是MaartenSchmidt猜测恒星形成率(SFR)与云层中氢原子气体密度有关。
Found in all the oceans of the world, including the Arctic Ocean, appendicularians tend to remain near the water's surface where the density of phytoplankton is greatest.
在世界上所有的海洋，包括北冰洋，尾海鞘都是出没在浮游植物密度最大的水域表面。
What's more, the temperature and density of the plumes could indicate a warmer, watery source beneath the surface.
更为重要的是，探测所得的温度和气流的密度表明，在星球表层以下有温暖潮湿的来源。
Moreover, the surface charge density of lipidic nanostructures can be varied in a simple manner.
更重要的是，其表面电荷密度可以通过简单方式改变。
In the simplest setup, the size of the current reveals the density of electrons in the surface, allowing it to be mapped out.
在这个最简单的装置里，电流的大小表明了样品表面电子的密度，并能绘制出来。
These maps show the location and relative density of mangroves, which cover roughly 137,760 square kilometers (53,190 square miles) of Earth’s surface.
这些地图显示了红树林的位置和相对分布密度，它们大约占据地球表面的137,760平方千米（53,190平方英里）。
These maps show the location and relative density of mangroves, which cover roughly 137,760 square kilometers (53,190 square miles) of Earth's surface.
这些地图显示了红树林的位置和相对分布密度，它们大约占据地球表面的137,760平方千米(53,190平方英里)。
They discovered that star formation is pretty well non-existent until the surface density reaches a certain threshold in parts of the cloud.
他们发现恒星只有在表面密度达到一定的阀值时才会较好的形成。
Because their density is only just smaller than sea water, a portion around one tenth of the iceberg usually sits above the surface.
由于冰山的密度比海水要小，一般露出海面的部分只占冰山的十分之一左右。
Ni : Average population density in area i. To simplify the analysis, Earth’s surface is divided into a grid of squares i, and the distribution is assumed to be uniform in each.
Ni：指i区的平均人口密度，为了简化分析，地球表面被按照网格分成多个i区，每个区的分布假定是统一的。
Staining of a thin sliver of each block can highlight the main bodies of nerve cells (top, purplish image) with the darker areas indicating high cell density near the brain's surface.
对每一块的细微纹路进行着色能突显出神经细胞的主体部分(上面略带紫色的图)。图中的偏暗区域代表了大脑表明的高细胞密度区域。
Laser as a heating source of high energy density of accurate control, can carry out multiple-sort strengthening treatment to the metal surface.
激光作为一种精密可控的高能量密度的热源，可对金属表面进行多种强化处理。
Studies show that surface sediments of the flood land seem to be the best sampling media in ultra-low density geochemical investigation in forest-swamp areas.
研究成果表明，河漫滩表层沉积物是森林超低密度地球化学调查的最佳采样介质。
Five see: texture is mainly from the surface of the stone, stone skin to see the hardness of the stone, density and delicate, bright and clean degree.
五看：质地主要是从石头的表层、石肤来看石头的硬度、密度与细腻、光洁的程度。
Electroplating: use the principle of electrolysis, the metal and alloy parts deposition in the surface, form even, density, good adhesion of the metal layer process.
电镀：利用电解原理，使金属或合金沉积在制件表面，形成均匀、致密、结合力良好的金属层的过程。
The content of the survey involved the volume density, surface and length densities.
内容涉及到各种组织的体积分数、面积密度、长度密度等。
In the case of the limited level density of the material surface energy, the fracture stress and the calculation formula of the engineering damage were studied.
本文研究考虑损伤时材料的断裂应力，推导出了在表面能密度有限的情况下，损伤断裂应力的计算公式。
The paper describes the measuring technique of infrared radiant heat flux density reached the surface or absorbed by the surface of spacecraft during thermal balance test.
文章介绍了在航天器热平衡试验中到达航天器表面或被其吸收的红外辐射热流密度的测量技术。
The inhibiting affectivity on ASR expansion increases obviously with the surface charge density of lithium compound.
随着锂化合物阴离子表面电荷密度的增加，其对膨胀的抑制效果依次增强。
In the present research, surface tension and density of borosilicate melts were measured and compared to that of Na-Ca containing glass melt using sessile drop method.
采用静滴法测量并对比典型低膨胀硼硅酸盐玻璃和普通钠钙硅玻璃的熔体密度和表面张力。
By adopting appropriate foundry techniques, the accuracy of dimension and shape were ensured. The surface quality and internal density of runner meet the requirements of design.
通过采用合理的铸造工艺，确保了其叶片型线尺寸精度、转轮表面质量及铸件内部的致密度满足了设计要求。
Comparing and analyzing the effects of current density and additives on surface morphology of the electroforming deposit.
对比分析了电流密度和添加剂对电铸层表面形貌的影响。
Low surface wettability and bulk density of petroleum asphalt are effectively solved by the use of a kind of surfactant and different particles distribution in the experiment.
实验中通过添加表面活性剂以及采用不同的粒度配比，有效地解决了石油沥青表面润湿性能差和具有较低堆密度的缺点。
Short-Term Probabilistic Forecasts of Ceiling and Visibility Utilizing High-Density Surface Weather Observations.
用高密度地面天气观测进行飞行高度和能见度短期概率预报。
Short-Term Probabilistic Forecasts of Ceiling and Visibility Utilizing High-Density Surface Weather Observations.
用高密度地面天气观测进行飞行高度和能见度短期概率预报。
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