密度

Generally, the FD treatment has decreased the densities of natural enemies and saprophagous insects .

覆膜旱作田天敌及腐食者于灌溉田。

Or the universe might even recollapse if dark energy density falls to a negative value.

当然宇宙也有可能因为暗能量降为负，而再塌陷。

Francium is the densest of the Alkali Metals and also radioactive.

钫碱金属中最大的,具有放射性。

In the stream with strong bed load movement there is no benthic macroinvertebrate.

河势散乱且河床运动剧烈的支流物种丰和均很甚至为零，生态条件差。

Easy to operate, store jerrican accretion,reduce the labor density.

操作方便，贮油桶油量增大，减少操作者劳动。

Measuring the bone density of mandibular angle and coxofemoral region with dual energy X-ray absorptiometer(DXA).

采用双能X线吸收测量仪(DXA，骨仪)，测量右侧髋部与左侧下颌角的骨矿物。

The constraint condition for the strain energy density function of incompressible hyperelasticity is proposed.

通过对各种有限元方法的分析比较，适当修改了已有的应变能函数的形式使之更适合数计算。

At the proximal and the distal ends of the nerve suture, the density of neurilemma cells in the unit area and the area size of the regenerated nerve fibers were observed and measured.

于神经缝合口近、远端检测神经鞘细胞和再生神经纤维面积的观察。

On the level distribution, the density of seed was higher in mesoslope and lowslope.On the vertical distribution, the number of seed took on a decreasing trend with the depth of soil increased.

种子水平分布上以中坡和下坡较高，在垂直分布上随着土壤深加深呈现减少的趋势。

As for the lung glandular cancer, the metastatic tumor to the brain shows a low density and sack-like low density under flat scanning.There is no obvious reinforcement and relatively slight hydroncus.

肺腺癌的脑转移瘤平扫表现为及囊状,强化不明显,水肿相对较轻.

It is indicated that chimozine is relative to the forming of peritrophic membrane (PMb) and the den-sity of PMb determined whether Nosema Apis Zander can inject in the ventriculus epithelium.

蜜蜂中肠酪素酶与蜜蜂中肠围食膜的形成有关，而围食膜的致又决定了蜜蜂微孢子虫能否侵入蜜蜂中肠上皮细胞。

From some field investigations (like Lake Constance and Lake Mead), the shape of a delta is not a Gilbert delta.Slope evolution between foreset and bottomset is not sharp but smooth.

当河川流入湖泊或水库时，若河川的高于湖泊，这时河川就会潜没入湖泊的底部形成异重流。

Hematoma under envelop of liver and spleen: 15 cases represented same or low density lunular focuses lying the edge of liver and spleen, some fresh hematoma represented high density.

肝脾包膜下血肿表现为肝脾缘等或新月形灶15例，部分新鲜血肿可为高灶。

Abstract： Based on twice survey data in the adjacent waters of Zhanjiang port of autumn and winter in 2005, the species composition and stock density of necton were analyzed.

摘 要： 根据2005年湛江港邻近水域秋冬2季渔业资源调查的资料，分析和研究了该水域游泳生物的种类组成及其资源的分布。

The effect of the mesh density, the change of dynamic plasticity property of mild steel with strain rate and the spotweld mechanical property on the simulation results is analyzed.

分析了网格、身用碳钢材料塑性特性随应变率的变化及焊点力学特性因素对仿真结果的影响。

On condition that the front body shape of the projectile is unchangeable,a formula is obtained for determining the relation between the optimum boattail angle and the supersonic flight region.

在弹丸前体外形和外界大气不变的条件下，提出了利用弹丸炮口马赫数和顶点马赫数确定旋转弹丸最佳尾锥角的方法。

The arc pressure distribution is in concordance with the hyperbolical curve and the current density distribution is in concordance with the Guass distribution under the presented experiment condition.

实验结果表明，在本试验条件下，电弧压力分布符合双面指数曲线分布，电流分布符合高斯分布规律。

On the other hand, floating types have density much smaller than 1, which means that there are real numbers unrepresented between consecutive floating values (i.e. there are gaps).

另一方面，浮点类型的远小于1，这意味着在相邻的浮点之间存在无法表示的实数(即有一定间隙)。

RESULTS The CTfeathures of ossifying fibroma inparanasal sinus were similar torotundity or unregular single high density lump in sinus, partarea of low density, integrity bone involucrum around it.

结果鼻窦骨化纤维瘤的CT表现为鼻窦内单发类圆形或不规则性高肿块,部分区域可见影,其周边出现完整骨性包壳,呈膨胀性生长,周边组织受压变形但分界清楚。

Compared with the D-larvae and the umbo-larvae, the densities of the post larvae and the settled spats show rapid reductions at the end of the development process.

与D形幼虫与壳顶幼虫相比，壳顶后期幼虫及附着稚贝的大幅下降。