The Moon's mean density is much lower than that of Earth but is about the same as that of Earth's mantle.
月球的平均密度比地球低得多，但与地球的地幔密度大致相同。
So you mean the density of the wood in the Cremonese violins is, is more uniform?
你是说，克雷莫纳小提琴的木头密度更均匀吗？
Cannily, the Corning researchers simply took the arithmetic mean of the oxide compositions and created a winning combination, known as "1737 glass", with exactly the right density.
康宁公司精明的研究人员们仅采用了算术平均法来处理氧化物，便成功地制造出一种称为“1737玻璃”的合成物，该玻璃的密度正好符合要求。
The higher the ratio (known, confusingly, as the density, even though bigger Numbers mean the snow is actually less dense), the drier and more powdery the snow.
该比率越高，积雪会越干燥和越像粉状(虽然该比率被称为是密度，但是其数字越大代表密度越低)。
And snow pressures on the ground and the coverings of greenhouses are calculated by mean density of snow in an area and new density of snow respectively.
并且为了提供更多的数据参考，本文采用各地区平均积雪密度和新雪密度分别计算出地面雪压和屋面雪压。
Through the analysis of their probability density function and mean trajectory, it shows that this system in these two cases can occur chaotic stochastic motion.
通过概率密度函灵数及平均相轨线的分析，指出该系统在这两种情况下作所谓的混沌随机运动。
No significant differences among food concentrations in the mean density and the production of males were observed.
雄体的平均密度和生产量在各食物浓度下无显著差异。
This paper introduces the approximate calculation of real number's or of vector parameter positive function's posterior mean, variance and forecasting density in mathematical statistics.
文章介绍了数理统计中实数或向量参数的正函数的后验平均、方差和预测密度的近似计算。
The degree of the overdispersion decreases with the increase ofthe mean density.
其聚集分布的强度随寄生虫种群平均密度的增加而降低。
A method calculating one body density matrix of nucleus in the mean field shell model is proposed.
提出平均场壳模型下原子核单体密度矩阵的一种计算方法，验证该方法的可靠性。
Giving concrete digital-modulated form, the mean power spectrum density of the signals discussed can be obtained in this way. The calculation can be done on computers.
给定具体的数字调角形式，用这种方法可在计算机上计算所给信号的平均功率谱密度。
And the number of species and mean density showed seasonal tendencies.
该水域仔稚鱼的种类和平均密度具有季节性变化趋势。
This paper has proposed a method to estimate traffic density using the output(traffic flow and time mean speed) of fixed traffic detectors.
本文提出了一种利用定点检测器数据（流量和时间平均速度）来获取交通流密度的方法。
Stand density index (SDI) was applied as a quantitative index to measure mean crowd degree between trees.
选择林分密度指数(SDI)作为反映林分中林木之间平均拥挤指标。
But there are linear correlation between population density and mean age.
种群密度与平均年龄有线性相关。
A decrease in patch density and an increase in mean patch size of landscape patch at landscape level indicated also that fragmentation of the whole landscape had been reduced.
在景观水平上，斑块密度明显下降，而平均斑块面积明显增加，反映了景观破碎化程度的降低。
Crossing into interstellar space would mean a sudden drop in the density of hot particles and an increase in the density of cold particles.
进入星际空间意味着热粒子的密度会突然降低而冷粒子的密度将升高。
The larger the density, the lower the effective mean normal stress, the more dilative response is.
土的密度越大，有效平均正应力越低，土的剪胀性就越大。
Comparing mean density measured by CT with kerosene mass method, mean error is less 1.2%.
CT法测得的平均密度与煤油法测定值相比，平均绝对误差不到1 . 2 %。
From pulp chamber to root apex, the diameter, the density and the mean percentage area of tubular openings all reduced gradually.
从髓室自根尖方向，牙本质小管口的直径、密度和相对面积均逐渐减小。
The effects on planting density and the amount of fertilizer applied to the yield components of several wheat varieties are studied by mean of random design.
采用随机区组设计，研究种植密度与施肥水平对几个小麦品种(系)产量构成的影响。
The mean wind energy density, mean effective wind energy density and annual available time of wind energy are calculated by using Two-Parameter Weibull Distribution function of wind speed.
采用风速的韦布尔双参数方法测算出平均风能密度、平均有效风能密度，以及年风能可利用时间。
Conclusion: Quantitative parameters of inspiratory and expiratory lung HRCT, especially mean lung density and the density difference changed subsequently with aging in asymptomatic nonsmokers.
结论：无症状非吸烟者随年龄变化，其吸呼气相hrct肺密度定量指标，尤其是呼气相平均肺密度和肺密度差，发生了相应的变化。
In this paper, based on NA samples, we will prove that recursive density kernel estimators are consistent inr-order mean, and the pointwise strong consistency under suitable conditions.
本文在一定的条件下证明了基于NA样本序列的递归型密度核估计的均方相合性和逐点强相合性。
Objective To explore the relationship of the mean color vessels density (MCVD) with TNM stage and pathologic microvessel density (MVD) in rectal cancers.
目的探讨直肠癌彩色血流平均密度(MCVD)与TNM分期、微血管密度(MVD)的关系。
The conditional density and the conditional mean are estimated by nonparametric method. Then the estimator of the parameter is proposed by the generalized method of moments.
使用非参数估计方法给出条件密度和条件均值的估计，在此基础上给出参数的广义矩估计。
The death and reproduction of the population make the mean density fluctuate but do not obviously change the overall level of population number and the population structure.
种群的死亡过程和繁殖过程使种群平均密度有较明显的波动，但对种群总体水平无明显影响，种群结构也无明显变化。
Results: the mean vessel density and diameter of port wine stain lesion is statistically more than those of normal skin.
结果：未治疗的鲜红斑痣皮损处与同一患者正常皮肤比较，平均血管密度和平均血管直径均较大，有统计学差异。
Parameters are fitted to vapor pressure, density and mean ionic activity coefficient data.
参数由拟合蒸汽压、密度和离子平均活度系数数据获得。
Parameters are fitted to vapor pressure, density and mean ionic activity coefficient data.
参数由拟合蒸汽压、密度和离子平均活度系数数据获得。
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