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For equilibrium conditions the number of grains deposited must equal the number of particles eroded.

作为平衡条件，沉降颗粒的数量必须等于受到侵蚀的颗粒数量。

Brown,1773-1858 observed minute particles within vacuoles in the pollen grains executing a continuous jittery motion while examining pollen grains and the spores of mosses and Equisetum suspended in water under a microscope.

Brown，1773-1858把花粉悬浮在水中，用显微镜观察，发现花粉的小颗粒在作不停地，无秩序的运动，这种现象叫做布郎运动。

Remarks :① In 1827, Scottish botanist Brown (,1773-1858) observed minute particles within vacuoles in the pollen grains executing a continuous jittery motion while examining pollen grains and the spores of mosses and Equisetum suspended in water under a microscope .

备注：①1827年，英国植物学家布郎(，1773-1858)把花粉悬浮在水中，用显微镜观察，发现花粉的小颗粒在作不停地，无秩序的运动，这种现象叫做布郎运动。

Dust particles are investigated in the dissertation are created in situ in RF discharge of mixture reactive gases of silane and ethene.

本文所研究的尘埃颗粒是利用等离子体增强化学反应法原位生成的。

At higher reaction temperature, Ir particles abstracted H atom from the adsorbed ethoxyl species and formed stable five-membered oxametallacycle intermediate (Ir-CH2CH2OO-Ce4+), which was helpful to the disruption of C-C bond and the reforming of CHx group.

高温时，Ir可能从-CH3基团中提取H原子，形成了Ir-CH2CH2OO-Ce4+结构，从而更有利于碳碳键的断裂和CHx物种的重整反应，提高氢气的产率。

At lower temperature, the interaction between the Ir particles and the adsorbed ethoxyl species is not strong enough to abstract H atom from the nearby CH3 group, and thus acetaldehyde acts as the key intermediate. Acetaldehyde can decompose to methane and CO and/or convert to acetone through decarbonylation.

低温时Ir粒子与吸附的乙氧基的相互作用的强度不足以从-CH3基团中提取H原子，此时乙醛是关键的反应中间物，乙醛可以裂解生成甲烷和一氧化碳或脱羰基生成丙酮。

Based on the model of DLA, this paper simulates the process of aggregation's growth for random walk particles from local area on two-dimension Euclidean plane. The aggregation is confined to Euclidean circular plane for large enough particle walking area and far enough partial source distance. The centre of the Euclidean circular plane is on the line between the particle source's symmetric centre and the seed particle, and is more closer to the particle source than the seed particle. Though the rate of aggregation growth is different in different directions, the whole aggregation shows fractal structure.

以DLA模型为基础，模拟研究了在二维欧几里德平面上由局部区域内产生随机运动粒子的聚集生长过程，发现对于足够大的粒子运动区域和足够远的粒子源距离，凝聚集团大体上被限制在欧氏圆形面内，圆心在粒子源对称中心和种粒子的连线上，且比种粒子更加接近粒子源；凝聚集团朝各个方向的平均生长速率虽然不同，但整体仍呈分形结构。

It is abserved that eutectic Si phases are found to be nucleated by the surface of SiC particles.

在研究中还发现，SiC颗粒可以作为共晶硅异质生核的衬底。

Always use some type of exfoliation product, which will help to remove old skin cells and other debris and particles from your skin.

总是使用某种产品剥离、这将有助于消除旧皮肤细胞和其他碎片和颗粒从你的皮肤。

For the implementation of National energy conservation, environmental protection policies, to achieve the strategic goal of sustainable development, the company take advantage of China Institute of Science and Technology platform advantages of building materials, energy-saving technologies for building the external walls of a systematic study, launched the expansion of polystyrene board in rock thin plastering exterior insulation and finish systems and polystyrene particles of rock powder exterior insulation and finish systems.

为贯彻国家节约能源、保护环境政策，实现可持续发展的战略目标，公司利用中国建筑材料科学研究院平台优势，对建筑外墙节能技术进行了系统的研究，推出了中岩膨胀聚苯板薄抹灰外墙外保温系统和中岩胶粉聚苯颗粒外墙外保温系统。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。