查询词典 infertile soil

Taking cohesionless soil under plane strain condition as anexample, a simple method to determine the angle of the non-coaxiality between directions of the principal strain increment and the principal stress is proposed, and the formula to evaluate the strain increments due to the rotation of principal axes is derived.

以平面应变条件下的无粘性土为例，提出了一个确定主应力轴旋转条件下主应变增量与主应力方向之间非共轴角的简单方法，推导出了主应力轴旋转产生的应变增量的计算公式，通过试验验证了方法和公式的适应性。

His own place lay in a rougher territory, where there was some clay in the soil and it was not so productive.

自己的地方在于他在粗糙的地区，那里有一些在土壤中粘土，它不是这样的生产。

Through to Gao Juexin and the Jia Baoyu character image analysis, promulgates them from to leave in a hurry to the return inevitability, because their thought deep place was still being rooted in the traditional values and the outlook on life, the ultra realistic thought, could not find the appropriate docking soil actually in the reality, thus returned feudal the old route to step onto "leaves in a hurry - the return" the pattern, but the tradition and the ultra realistic values were still waging the intense struggle, they could not again turn the feudalism defender of traditional moral principles.

通过对高觉新与贾宝玉人物形象分析，揭示他们从出走到回归的必然性，由于他们的思想深处仍根植着传统的价值观和人生观，超现实思想，在现实中却找不到合适的对接土壤，从而转回封建的老路走上"出走—回归"模式，但传统和超现实价值观仍然在进行激烈的斗争，他们不会再变成封建的卫道者。

Because the limited time period of this study, to investigate the long term effects of row space and crop density on reducing soil evaporation are necessary in the future.

由于这次研究的期间较短，对行距、多播等项目的研究尚不够深入，有必要在今后的工作中进一步探讨。同时，对哪种秸秆可以避免降低冬小麦地温的问题进行深入研究，具有重要的现实意义，如果能解决好这个问题，则不仅有利于秸秆覆盖的大面积推广，而且能达到在使作物增产的同时减少土壤蒸发的目的。

In upper soil layer, water content is higher in 7.5 cm row space treatment than others.

窄行距的表层土壤含水量也比其他处理高。

This study focuses on the effects and mechanism of agricultural practices (row space,mulching, plant density, and cultivation methods) on soil evaporation.

同时，对影响土壤蒸发的主要因素进行了分析，为探寻新的抑蒸节水措施提供科学依据。

Narrower row space can significantly reduce soil evaporation because of its higher leaf area index and lower wind velocity under canopy.

窄行距对土壤蒸发的抑制效果很明显，行距越窄，土壤蒸发量越小，土壤蒸发量与蒸散量的比值也越小，农田用水中的无效损耗也就越小。

For designer Jim Ruck has popped up with a revolutionary technology that grows plants and vegetables without using the soil and fertilizers.

设计师Jim Ruck突发奇想出一个革命性的技术，种植植物和蔬菜不使用土壤和肥料。

The effect of soil temperature on the growth was studied in Rudbeckia hirta, a biennial herbaceous flower.

以二年生草本花卉黑心菊为材料，研究了土壤温度对其生长发育的影响。

A series of research and analysis deal with several dealing impact factor(soil、 fertilizer、plant diseases and insect pests、ruderal、water quality and prune) of Green grass character in ShenZhen golf club.

本文以深圳高尔夫俱乐部球场果岭作为试验地，针对果岭草坪表现性状的几个主要影响因子：土壤、肥料、病虫害和杂草、水源、修剪高度分别进行了一系列的研究和分析。

Listen,point and check your answers.

听，指出并且检查你的答案。

Warming needle is one of effective treatment methods for knee arthralgia aggravated by cold,and it is simple,safety,so it should be developed in clinical acupuncture and moxibustion extensively.

但以本院科针灸门诊在2005年1月—2006年6月期间共收治膝痛患者100余例，经过临床的诊断后，其中施以温针治疗的48例，疗效显著，报道如下。1临床资料本组病例48