科学家们已经确定，在埃塞俄比亚阿法尔地区干燥河床的细颗粒沉积物中发现的具有锋利边缘的石片存在于252万至260万年前。
Scientists have dated sharp-edged flakes of stone found in the fine-grained sediments of a dry riverbed in the Afar region of Ethiopia to between 2.52 and 2.60 million years ago.
分析了金属超细颗粒的吸波机制。
The absorbing mechanism of metallic ultra fine grain has been analyzed.
从粉末冶金部件清除细颗粒。
SARS病毒从本质上说是一种超细颗粒。
土壤细颗粒的损失对土壤有效钾影响最大。
The loss of fine soil has the most sensitive impact on available potassium.
细颗粒砂土比粗颗粒砂土具有更大的变形量。
Sandy soil with fine grains has more deformation than sandy soil with coarse grains.
浮选柱是回收细颗粒有价矿物的高效分选设备。
Floatation column is a high efficiency separation equipment recovering valuable mineral fines.
另一方面，依照数据存取的需求，需要高和细颗粒度的接口。
Data access, on the other side, can require both high and fine granularity of interfaces, depending on the data access requirements.
本文首先提出了一个细颗粒悬浮泥沙的动力学判据。
A dynamic criterion of suspended fine sand-mud is given in the paper.
土壤中细颗粒的流失是土壤质量恶化的重要表现之一。
The fine particle loss in the soil is an important issue of soil quality degradation.
本文通过实验研究，找出了影响细颗粒尾砂絮凝沉降的因素。
On the basis of experiments, the factors influencing the flocculating settling of fine particle tailings have been found.
通过室内水槽试验，描述了波浪作用下细颗粒泥沙的起动现象。
The threshold phenomenon of fine sediment under wave action is described based on a flume experiment.
结果表明动态光散射法在超细颗粒粒径测量中有着广阔的应用前景。
It shows that the dynamic light scattering technique is suitable to and has broad application prospects for the measurements of ultrafine particles.
分散细颗粒（包括分散固体颗粒和分散液滴）可以明显增强气液传质。
The gas-liquid mass transfer is enhanced significantly due to presence of some finely dis- persed particles (activated carbon, dispersed oil and so on) in multiphase systems.
他们还发现新的气溶胶颗粒——悬浮在大气中的超细颗粒——可以在这个高度形成。
They also found that new aerosol particles - ultrafine particles suspended in the atmosphere - can form at these heights.
同时在大庆油田开展了水力旋流器用于分离细颗粒的现场实验研究工作。
In addition, oilfield experimental work of the hydrocyclone for separating fine particles was carried out in Daqing Oilfields.
测量结果说明介质和温度对旋风分离器分离细颗粒催化剂有一定的影响。
The measurement results denoted that: the medium and temperature produced a certain influence on fine grain catalyst separated from cyclone.
研究中按照电焊工人工作环境中氧化锰超细颗粒的浓度做了相应的测验。
The study tested manganese oxide ultrafine particles at a concentration typically inhaled by factory welders.
不同粒径颗粒的化学分析结果表明，微量元素在细颗粒上有较高的富集。
Chemical compositions varied significantly in different particle sizes, with trace elements obviously enriched in the least size.
本文首先阐述由环形水槽试验所得出的细颗粒泥沙动水絮凝的若干规律。
Some laws on hydrodynamic flocculation of fine sediments found in the circular channel test was elaborated at the beginning of the paper.
围海造地工程中新吹填细颗粒土会经过析水落淤-自重压密-排水固结的过程。
Fresh hydraulic fill mud in the process of land reclamation will take the procedure of grain sediment, self-weight compression and drainage consolidation.
结果表明，该区表层沉积物类型以细颗粒沉积为主，具有淤泥质岸带的沉积特征。
The results showed that fine particle sediment type is the main sediment type, which has the sedimentation characteristics of silt shore belt.
结果表明：金属超细颗粒弥散系的微波吸收与粒度、涂层的厚度及配制方式有关。
The results show clearly that the microwave absorption of dispersions of metallic ultra fine grain relates to particle size, coating thickness, and method preparation.
对于相近骨架相对密度的两种试样，中颗粒试样比细颗粒试样具有更多的解理面。
As to the same skeleton density, med-particle samples own more cleavages than that of fine-particle samples.
大多数元素以陆源为主，粘土(或细颗粒沉积物)是控制底质金属含量的主要因素。
Elements are mainly terrigenous, clay (or fine muddy matter) is the major factor controlling the concentrations of heavy metals in sediments.
研究表明，水石流中细颗粒的存在，其输沙浓度比相同纵坡下没有细颗粒时有很大提高。
It is found that due to the existence of fine particles in flow, the transport concentration of solid will increase with the same slope of gully.
黏性泥沙絮团的形成机理和沉降特性对河口海岸细颗粒泥沙运动规律研究具有重要作用。
The complicated fractal flocculation processes and settling behavior of cohesive sediment are very important to understand the cohesive sediment transport in estuaries and along coasts.
铝类絮凝剂对细颗粒泥沙絮凝沉降有重要作用，常应用于浑水澄清、农业污水处理等研究中。
Aluminum flocculants have an important role in the flocculation and settling of fine sediment, and are often used to clear muddy water and treat agricultural waste water.
环形水槽是研究细颗粒泥沙的理想装置，但测沙技术的相对滞后极大地制约了环形水槽的使用。
The annular flume, which is an ideal instrument to study fine sediment, is restricted by the technology of sediment measurement.
环形水槽是研究细颗粒泥沙的理想装置，但测沙技术的相对滞后极大地制约了环形水槽的使用。
The annular flume, which is an ideal instrument to study fine sediment, is restricted by the technology of sediment measurement.
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