因为这些星系的质量分布在更大的区域，它们每单位体积的恒星数量比传统星系要少得多。
Because these galaxies' mass is spread out over larger areas, they have far fewer stars per unit volume than do conventional galaxies.
处于亮椭圆地区的北极极光与南极极光相比，显得体积较小但密度更大。这意味着土星的磁场并不是均匀分布的。
This implies that Saturn's magnetic field is not equally distributed across the planet.
一种气压的分布情况，其中给定体积内的空气质量，即空气的密度，不仅仅是气压的函数。
A distribution of air pressure and the mass of a given volume of air such that the air density is not a function only of atmospheric pressure.
根据计划靶区的等剂量分布、体积-剂量直方图以及其他的剂量学指标，比较两种不同治疗计划的优劣。
All plans were compared according to the planning target volume coverage, dose-volume histogram and other dosimetric parameters of normal tissues.
采用最大熵原理，推导出喷雾场液滴体积分布函数。
A distribution function of droplet volume was derived using the information entropy.
通过质量加权平均，给出了石墨粉尘的体积、面积和直径分布函数。
By the mass-weighted average, the distribution function of volume, area and diameter for graphite particle were obtained.
结果表明，提高低电阻率硅的体积含量和其分布连续性，可降低材料的整体电阻率。
The effect of each phase volume fractions and distribution on the bulk material's electrical resistivity was analyzed and compared.
通过对气体的体积分数分布的分析，可以方便快捷地预测CFD模型的分离性能。
The separation performance of the CFD model could be easily predicted by analyzing the distribution of the volume percentage of the gas.
代表性体积元法是研究复合材料这类具有多尺度、离散分布多相体的有效手段。
Representative volume element (RVE) is an effective method for analyzing composites with characters of multi-scale and random distribution.
结论左侧乳腺癌保乳术后，调强放疗能改善靶区剂量分布、减少心脏受照剂量和体积。
Conclusion IMRT can improve CTV dose distribution and reduce the cardiac dose and volume for the left breast cancer after breast-conserving surgery.
模拟结果可以直接表征反应器内的温度场、气体组分体积分数分布。
The simulation result can describe the temperature field and the distribution of volume fraction of mixed gas in methanol reforming reactor.
根据肿瘤的位置、临床靶体积、病人的身体状况与治疗目的，制定放射治疗计划及调整剂量分布。
Radiotherapeutic plan was worked out and dosage distribution were set on the basis of the carcinoma position, clinical target volume, health condition of patients and therapeutic aim.
气压的-种分布情况，给定体积内空气质量，即空气的密度，仅仅是气压的函数。
A distribution of air pressure and the mass of a given volume of air such that the air density is a function of only atmospheric pressure.
相邻t分期中肿瘤体积分布具有重叠情况。
There was an overlap in distribution of tumor volume in adjacent t staging.
第二相的尺寸、形貌、分布及体积分数与试验钢的性能是密切相关的。
They were closely correlative between size, shape, volume percent and distributing of the second phases and properties of testing steels.
是否可以根据岩样的孔隙度和渗透率的大小反演岩样的孔喉体积分布，或者反演毛管压力曲线？
So if we can inverse the distribution of pore throat or the capillary pressure curve by the pore and permeability data of the core?
结构拓扑优化的目的是寻求结构的某种分布，使其能够在满足体积、位移等约束条件的情况下，让某种性能达到最优。
The purpose of topology optimization is to find a distribution of the structure, so that it can meet the volume, displacement constraint conditions et al, and attain some optimal performances.
考虑粉粒体积分率及粒径分布对流动的影响。
Considering the influences of the particle volume fraction and the distribution of particle size on the flow.
消光起伏法是一种新的颗粒测量方法，可用来同时测量两相流中颗粒的粒径分布和体积浓度。
Transmission fluctuation spectrometry (TFS) is a new method for particle size measurements, in which the particle size distribution and particle concentration can be measured simultaneously.
如果离子固体有外力的约束，或者缺陷分布的不均匀，都会导致这样的偏离，因而会引起固体体积的改变，也就是说会产生内应力。
Such deviation generates volumetric change in the solid, which will result in mechanical stresses if the ionic solid is under mechanical constraints, or if the defect distribution is not uniform.
为使过滤材料在使用中达到令人满意的性能，要求过滤介质具有适宜的孔径尺寸、孔径分布、孔体积、孔表面积及渗透性。
Filtration media is required to have suitable pore size, pore size distribution, pore volume, pore surface area and permeability for performing satisfactorily in applications.
结论：照射野方向和照射野的数目对剂量分布有影响，增加照射野的数目可以改善体积较大的病灶的剂量分布。
Conclusions: the beam Angle and the number of beams have influence upon dose distribution, the dose distribution would be improved for large volume target with the increment of beam number.
本研究旨在评价红细胞平均体积（MCV）、红细胞脆性、红细胞体积分布宽度（RDW）对新生儿地中海贫血的诊断价值。
This study aimed to evaluate the value of mean corpuscular volume (MCV), red cell distribution width (RDW) and erythrocyte fragility in the diagnosis of neonatal thalassemia.
树叶的分布以及树干和枝杈的体积影响叶子的形状吗？
Does the distribution of leaves within the "volume" of the tree and its branches effect the shape?
微生物以其体积小、繁殖快、具有巨大的比表面积等特点可以大大地改变微量金属在环境中的分布。
Microorganisms can change the distribution of trace metals in the surroundings with their small volume, rapid propagating and huge specific surface area.
这种大变形如果仅是应力重分布引起的体积膨胀则称为岩石扩容。
This large deformation is called for rock dilatancy if volume dilation only occurs owing to stress redistribution.
另外，炭黑粒子分布的不均匀性导致了海绵的体积电阻率较高。
The uneven dispersion of CB in foam results in higher volume resistivity.
本论文根据制备梯度功能材料成分分布的非线性理论，计算出聚氨酯在混合树脂中体积比的分布函数。
According to the non-linear theory of composition of the graded function materials distribution, the volume content function of polyurethane in the mixed resin was achieved.
结果表明，单一接触类型的配位数及分量配位数分布与体积组成有关。
Results show that the volume fraction influences the distributions of coordination number of single contact type and individual components.
原子中的正电荷分布在整个原子体积上。
The positive charge in the atom is spread over the whole atomic volume.
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