查询词典 sand

At the same soil layer, the phreatic evaporation decreases with the increase of sand positions and the decrease of sand particle sizes.

研究结果表明：砂层对水分蒸发既有促进也有抑制作用，相同厚度时潜水蒸发强度随砂层层位的升高以及级配的变差而降低。

Vegetation restoration also resulted in the changes of soil physicochemistry properties including the significant increase in contents of organic matter, total nitrogen, available potassium, fine sand, very fine sand and clay, and the decrease in available nitrogen, phosphorus.

植被的恢复使土壤理化性质发生了变化，与封育前相比土壤中有机质、全N、速效K以及细砂、特别细砂和粘粒含量显著增加；速效N、速效P降低。

This project is to make aeroconcrete through the high temp and high pressure to make it into poriferous AAC with the tail quartz sand as the main material, the cement and lime as agglutinant featuring wind block, warm-keeping, sound/heat insulation, water/humidity resistance, antifreezing, vibration proof, acid/alkaline resistance, partial load bearing, large size and weight light, shape formed optionally, moreover, it is a new building material of mast processing possibility since it can be sawed, drilled and nailed so as to save masonry sand and slurry and quicken the process and simplify the operation.

本项目加气混凝土主要是以石英尾砂为基础，以水泥和石灰为胶和剂，经高温高压养护而成的多孔状AAC。

In this thesis, the adaptive strategies of the psammophyte plants in Otindag Sandland to the sand moisture, sand burial and environmental heterogeneity are investigated using both field and greenhouse experiments.

本文应用实验生态学方法研究了沙地植物对水分、沙埋和养分异质性环境的生态适应对策。浑善达克沙地属于半干旱区域。

In Punan area of Daqing oilfield, the total thickness of Putaohua oil layers is 10~30 m and the individual sand bodies are thin, dispersed, mixed, and transversally variable. Conventional methods can not predict individual sand body precisely.

大庆油田葡南地区葡萄花油层的总厚度薄(10~30m)，单砂层具有薄、多、散、杂等特点，砂体厚度横向变化快，用常规的预测方法难以对单个砂体进行准确的描述。

The tesinic sand is used in casting iton casting steel and nonferrous metal casting.the best is to use the original of the resinic sand.

用级少的粘结剂、即可得到最大的粘结强度，对铸铁、铸钢、有色金属铸件树脂砂用原砂最理想。

Patterns in Nature: Sand A ridged sand dune sparkles under the Nevada sun.

一处山脊沙丘火花在内华达州太阳之下。

Patterns in Nature: Sand A ridged sand dune sparkles under the Nevada sun.

一个山脊沙丘发光闪烁在内华达州太阳之下。

From nature factor, there is arid and strong wind and plenty of sand material that derives from alleviation of rivers in Shiquanhe basin. The vegetation ecology system is very vulnerable. From human being action, the actions of secular excessive firewood and herd and disorder exploitation sandrock make origin vegetation completely destroy and alleviation including plenty of sand material whose structure is loose expose under the effect of wind force.

从自然因素看，狮泉河盆地气候干旱多风，河流冲积形成的沙源物质丰富，植物生态系统脆弱；从人类活动来看，多年的滥樵、过牧、乱采砂石等行为，将原植被破坏殆尽，使结构松散的含有丰富沙物质的狮泉河冲积物直接暴露于风力作用之下。

The degradation process of the sandy rangeland expresses the change from fixed sand to semifixed sand.

沙地草场退化过程主要表现为固定沙地向流动沙地的演化。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。