稀疏

Self-thinning mechanism and climate reactions of growth of Chinese fir plantation are theoretical basic forsustainable management and development of Chinese fir plantation.

杉木人工林自然稀疏机制与生长的气候响应是杉木人工林持续经营的理论基础，对于指导林业生产具有重要意义。

Self-thinning procedure was found be related to site and initial density by analyzing ultimate self-thinning line of larch plantations.

通过对人工落叶松林分最大密度曲线的分析，发现林分自然稀疏过程与立地条件和初植密度有关。

Based on the famous -3/2 power rule, the equations were established on the relationship between density of stand and the mean diameter, mean basal area of individual and total basal area of stands in the process of the self-thinning of Pinus taiwanensis natural forest.

应用-3/2法则，建立黄山松天然林自然稀疏过程中林分密度与平均直径、平均木断面积、总断面积的相关关系。

The self-thinning rule, a universal biological law in an even-aged plant population, describes decreasing processes of population densities at -3/2 power of plant mean weight on log-log graph.

自然稀疏法则描述在对数座标系上种群密度按植物平均重的-3/2乘方减少的过程。

On the basis of stand of masson pine in Hubei Province, an advantageous height growth model、models of stand self-thinning,diameter growth before thinning and after thinning,diameter distributions model,tree height curve was formulated,and forcast model of wood recovery by stem analysis was established.

利用湖北省马尾松人工林的样地资料，建立了优势高生长方程、林分自然稀疏方程、未疏伐林分直径生长方程、疏伐后林分生长预测方程、直径分布模型、树高曲线方程；根据现场造材资料，建立了材种出材率预测模型。

By means of the quantitative theory I,the relationships between environmental theory 1,the relationships between environmentalfactors and the density chang during self-thining of Cunninghamia lanceolata plantation were set up,and themain environmental factors affectes on self-thinning significantly,which are altitude,situation of slope andmean diameter at breast height,were gained.

提出森林自疏过程中密度随时间变化的调节模型、提出并阐述应用于森林自疏规律研究的基于改进单纯形法的网络模型的基本原理和算法，两方法经山杨林、云南松林的自疏过程密度随时间变化资料进行验证，证明两方法更合理且适用性更强，进而将其应用于杉木林自然稀疏规律模拟，模拟残差平方和仅为前人模型的92.8％和56.1％，效果较理想。

The reticulated vessel which has large cavity has thicker wall due to more elastic fibers and more smooth muscles and its endothelium is cuboidal epithelium which has rotundity karyons. But the reticulated vessel which has small cavity has thinner wall due to less elastic fibers and less smooth muscles and its endothelial cells are flat epithelial cells which have long-shuttle-shaped karyons. In some regions, the ducts are very small in diameter and thin of wall, and they become blood sinus in the end.

管腔大者，管壁厚，弹性纤维、平滑肌纤维多，内膜靠腔面内皮细胞多成立方状，细胞核端位近圆形；管腔小者，管壁薄，弹性纤维、平滑肌纤维少，内皮细胞扁平、排列稀疏，胞核长梭形；一些区域管径极小，管壁极薄，成为开放的血窦，只允许一个血细胞通过。

The real data verification shows that the wavelet, reflection factor and acoustic impedance given by PCGA are more accurate, quicker convergent and value stable than the existing direct sparse inversion method.

用实际数据检验算法，表明预条件共轭梯度法反演的子波、反射系数和波阻抗要比直接稀疏反演精度高、收敛快、数值稳定。

Tong Gate walls standing far away, you can see some of the red-brick residential buildings thinly.

童咖忒墙壁站在不远的地方，你可以看到一些用红砖建成的住宅楼宇稀疏。

Criticism centered not only on the childish design of the gauges, but also on their sparse hash marks.

批评的中心不仅对幼稚的设计压力表，而且也对他们的稀疏散列马克。

They weren't aggressive, but I yelled and threw a rock in their direction to get them off the trail and away from me, just in case.

他们没有侵略性，但我大喊，并在他们的方向扔石头让他们过的线索，远离我，以防万一。

In slot 2 in your bag put wrapping paper, quantity does not matter in this case.

在你的书包里槽2把包装纸、数量无关紧要。