coarse sand

It could improve survival rate of seedlings to chose coarse sand or coarse sand and perlite ( 1 ∶ 1) as media and transplant test tube seedlings in spring and autumn, and the rate was about 90%.

在试管苗移栽阶段，基质选用粗河沙或粗河沙+珍珠岩（1∶1），于春天和冬天移栽，可提高试管苗移栽的成活率，使移栽成活率达到90%左右。

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The test target of "depositing coarse sand and discharging the fine" is basically achieved.

放淤试验工程淤粗排细的目标基本得以实现。

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On this basis, the field test was used to research the removal efficiency of Integrated Vertical Flow Constructed Wetland with coconut husk and gravel and coarse sand on the low concentration rubber wastewater treatment.

在此基础上，采用现场试验研究方法，选择椰糠、砾石和粗砂三种填料类型的复合垂直流人工湿地对天然橡胶加工业低浓度制胶废水进行了深度处理试验研究。

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Study of geographic factors that influence silt-trap dam construction: A case study in the arenaceous and coarse sand region, midstream of Yellow River

影响淤地坝建设的地理要素&以黄河中游多沙粗沙区为例

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Effect of Warping Dams in Silt-Laden and Coarse Sand Region of the Middle Yellow River to Sediment Grading

黄河中游多沙粗沙区淤地坝对泥沙的分选作用

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Thus coarse sand and clay had larger capacity for pyrene sorption.

粗砂粒组和粘粒组对芘的吸附能力较大，细砂粒组和粉砂粒组相对较小。

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Selection of Precipitation Scheme for Submerged Water-bearing Formation with Middle-sized Coarse Sand and Cobblestone

中粗砂含砾卵石潜水含水层降水方案选择

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Although total phosphorus can seep into coarse sand in the earlier times of river polluting, most of phosphorus is intercepted caught in mud and media formed with time and little phosphorus can enter into groundwater.

虽然在排污河形成早期总磷在粗砂中会产生穿透，但随着时间的推移，由于河流底泥的形成，磷大部分被截留于底泥和介质内部，能够直接进入地下水的量很少。

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Evaluation of Ecological Environment in Plentiful and Coarse Sand Area in Loess Plateau

黄土高原多沙粗沙区生态环境评价

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In the trial range, the effect of sand percentage and coarse aggregate gradation on the strength of concrete is not significant. And they could be certained by the pumpability and other technical indicators.

在试验选定的研究范围内，砂率和粗骨料级配则对混凝土的强度影响不显著，可根据混凝土可泵性等其它技术指标确定其合理取值范围。

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The natural sand is the non-renewable resources, the coarse sand were already getting fewer and fewer.

天然砂是不可再生资源，经过我国这几十年来的大规模开采和使用，优质的中、粗砂已经越来越少。

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Through researching grain size characteristics of north part of the Tengger Desert, we get the results: ( 1) dunes sediment of north margin of the Tengger Desert donot include gravel, very coarse sand and silt.

研究腾格里沙漠北缘沙丘粒度特征得出：（1）腾格里沙漠北缘沙丘沉积物不含砾石、极粗砂和粉沙。

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The sand is coarse.

这沙子粗糙。

词典精选例句

These particles range from coarse silt to sand or pebble size.

这些颗粒的大小变化范围是从粗粉砂级到砂级或细砂级.

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Middle Pleistocene strata: gravel layer; sand, coarse sand interbedded with gravel layers; gravel layers.

中更新世：砾石层；砂、粗砂与砾石层互层；砾石层。

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Correlation study of light dynamic penetration test and cone penetration test in testing coarse sand

轻型动力触探法与静力触探法检测粗砂相对密实度的相关性研究

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In the bedload movement process, coarse sand tended to stay on the sand bar, find sand was brought away.

底沙运动过程中粗粒沙滞留在沙洲，细粒沙被搬走。

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These may range from coarse silt to sand or peble size.

这些颗粒的大小变化范围,从粗粉砂级到砂级或细砂级.

词典精选例句

This was an adaptation to the steppes of the Central Asia, which largely consisted of a hard, rocky ground, covered with coarse sand, more like fine gravel and of stiff, parched vegetation.

这是一种适应中亚的大草原，这在很大程度上是一种坚硬，岩石地面布满粗砂，更像细砾和僵硬，口干舌燥植被，包括。

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First, a kind of similar material of porous rock was prepared with the orthogonal test method, which was made of coarse sand, permeable concrete strength additive, cement and water. And its five similarity coefficient is approximately equal to 1.

首先，借助正交试验，配制出了由中粗砂、透水混凝土增强剂、水泥和水组成的满足5个相似系数近似等于1的一种多孔隙岩体相似材料。

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