密度是由树木的生长方式决定的。
昆虫和病原体是森林生态系统的固有成分，通常其密度相对较低，所造成的损害较小，对树木生长及其活力的影响微乎其微。
Insects and pathogens are integral components of forest ecosystems and normally are present at a relatively low density, causing little damage, and having negligible impact on tree growth and vigour.
BMP12是一组控制哺乳动物毛发和鸟类羽毛密度的蛋白质，它的主要作用是减缓羽毛的生长。
BMP12 is one of a group of proteins that control the density of hair in mammals and feathers in birds. In the case of BMP12, it slows down the growth of such features.
非常小的细胞也许能在清澈的溶液中生长，但是，不会产生足以使溶液变混的密度。
In a clear solution very tiny cells might grow but not create the density sufficient to make the solution cloudy.
这些毛囊无论如何是不会受到剃胡子的影响的只有当你的露在外面部分的毛发已经死了或者被剪掉了，皮肤下的毛囊决定毛发密度/颜色/生长率，但仍然完全不会受到你刮胡子或不刮胡子的影响。
Only the outer part of your hair that is already dead is getting cut. The follicles underneath that determine thickness/color/growth rate remain completely unaffected by your shaving or not shaving.
荞麦菜的产量、品质及生长受栽培基质、密度、温度、光照和水分等因素的影响。
Its output, quality and growth are affected by base manure, density, temperature, light and moisture.
实验结果预示着在高电子密度的ICPCVD过程中，活性原子集团的形成以及薄膜的生长机理与传统的等离子体CVD过程不同。
The results show that formation of the precursor radicals and the growth mechanism in ICP-CVD with high electron density are different from those in conventional CVD with low electron density.
延长光照时间能加快微囊蓝细菌的生长速率和提高微囊蓝细菌的密度。
With the increasing of the light period length, the growth rate and cell density rose gradually and exogenous phosphorus level declined rapidly in the water.
解剖树木生长过程木材密度变化规律，研究年轮内密度的变化十分重要。
So it is very important to find out the variation regulation of wood ring density in growth process.
林龄单因变量的蓄积量生长模型决定系数低，引入地位指数和密度指数再次参数化的生长模型可显著提高模型拟合度。
Single age variable stock volume growth model had low coefficient of determination, but it was improved a lot by introducing site index and stand density index in reparameterization.
结论神经生长因子能增加大鼠心肌梗塞后胆碱能神经纤维的密度，可能对心梗有治疗作用。
Conclusion NGF increases the density of the cholinergic fibers in AMI rat and might have the possible effect on the treatment of AMI.
这两个栅和场氧化层都是通过热氧化过程生长出来的，因为只有热氧化才可以提供具有低陷阱密度性能最好的氧化层。
Both gate and field oxides generally are grown by a thermal oxidation process because only thermal oxidation can provide the highest-quality oxides having the lowest. interface trap densities.
再根据晶体大小分布理论（CSD），计算出斜长石的晶体生长速率、成核密度及成核速率等岩浆结晶动力学参数；
On the basis of the crystal size distribution (CSD) theory, the growth rates, nucleation density and nucleation rates of plagioclase have been worked out.
结论氦-氖激光对培养瘢痕成纤维细胞生长的抑制效应与能量密度、照射次数有关。
Conclusion Inhibitory effect of He Ne laser irradiation on growth of scar fibroblasts is tightly associated with energy density and irradiation times.
结果显示：细椰纤处理可促进草坪地上部生长及增加密度。
The results showed that coir can significantly promoted shoot growth and increase turf density.
水流和养殖密度对史氏鲟的生长有着显著的影响。
The growth performances were significantly affected by water current and stocking density.
让我来猜猜。科学家应该觉得像制造“史特拉第瓦里”这样的小提琴制造者就用了来自这些生长缓慢、且木质密度高的树的木头吧！
Let me guess. The scientists think that a violin maker like Stradivarius used wood from these slowly growing, denser trees to make violins.
肺肿瘤；微血管密度；血管内皮生长因子。
Lung cancer; Microvessel density; Vascular endothelial growth factor.
提出一种基于过程神经网络的木材生长轮密度长期预测方法。
A long-term forecast method of timber growth ring density based on process neural network was proposed in this paper.
微重力环境下细胞的生长：细胞易于聚集，产生更高的细胞密度。
Cell growth in simulated microgravity environment: cells were prone to aggregate, and much higher cell density was generated.
造林密度大，则生长轮变窄，管胞列数减少，晚材率增加。
As planting density increased, the growth ring width and tracheid row decreased but proportion of late wood increased.
果点大小、密度与生长调节剂的关系不大。
The relationships among the dot diameter, dot density and growth regulators were not significant.
采用不同种植密度方式对墨西哥专用青饲玉米的最佳种植密度及生长规律进行了研究。
The optimum planting density and growth rhythm of the Mexico maize variety for special fresh fodder were (investigated) by using different planting densities.
采用两因素五梯度的正交设计方法，分析了不同饲养密度和不同饵料密度对花鲈稚鱼生长及存活的影响。
This paper describes the effect of stocking density and bait density on the growth and survival of juvenile Lateolabrax japonicus by the method of orthogonal design.
胸径、材积、冠幅、新梢生长量随造林密度减小显著增大。
The DBH, volume, crown breadth and the growth of shoots increase obviously as the density decreases.
结果表明，微弧氧化陶瓷层向内与向外的生长比例受强化时间和电流密度综合控制。
Results show that the proportion of inward to outward growth varies with intensifying time and current density.
目的研究小儿原发性肝脏恶性肿瘤中血管内皮生长因子(VEGF)和微血管密度(MVD)的特点。
Objective to study the features of vascular endothelial growth factor (VEGF) expression and microvascular densities (MVD) count in pediatric malignant liver tumors.
结果表明，在木屑、米糠混合培养基上菌丝的生长速度、密度以及菌丝的健壮程度都明显好于pda培养基上生长的菌丝。
The results showed that the growth rate, density and the health of mycelia on the medium mixed with wood flour and rice bram were significant better than that in contrast medium PDA.
以最佳成岛温度生长时，岛密度随覆盖度的增加呈现增加—饱和—减小的变化规律。
With coverage increasing, the island density increases continuously at low temperature and high depo.
以最佳成岛温度生长时，岛密度随覆盖度的增加呈现增加—饱和—减小的变化规律。
With coverage increasing, the island density increases continuously at low temperature and high depo.
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