地面下的土壤

1Sandy soil with some humus under Litchi chinensis Sonn, Euphoria longana Steud,Aglaia odorata Lour, bamboo and under Ficus retusa Linn.;(2) soil beneath moss undertrees or in shady places.

在过于潮湿和腐植质过多，地面较硬和完全向阳的场所都未发现该虫孳生。土壤分层检查结果看来，孳生主要在地面下一厘米范围内。

It indicates that emphasis should be put on the following subjects in the future: the determination of field infiltration coefficient and roughness coefficient;the optimal combination of field standard and irrigation technical index ,and the rational ground levelness degree and mode.

对近10多年来地面灌溉水流运动数值模拟方面的国内外研究进展进行了归类整理，并就目前研究中存在的不足和未来急待深入研究的问题进行了探讨，认为在今后的研究中应把地面灌溉入渗参数和糙率的确定问题，不同地区和作物条件下合理的田块尺寸与灌水要素的优化组合研究及经济合理的田间土地平整度及平地模式的研究，长畦分段灌、阶式水平畦灌、覆膜灌溉条件下的水流运动和合理灌水技术指标的研究，浑水灌溉和土壤气阻对地面灌溉水流运动的影响机理研究等作为重点内容。

At last, we compare and analyze WUE under different water supply methods and different water treatments. It indicates WUE of subirrigation is higher than traditional irrigation, so subirrigation is a water-saving irrigation method.

最后，本文比较分析了苗期冬小麦在各种水分处理条件下的土壤水分利用效率，结果表明浸润灌溉条件下的水分利用效率要高于地面灌溉，所以用浸润灌溉方式，可以节约水分，提高水的经济价值。

Soil erosion is defined as the course of destroying, denudating, moving and depositing of soil and other substances on the ground, under the actions of hydraulic forces, wind, gravity and freeze-thaw.

土壤侵蚀是指在水力、风力、重力、冻融以及其它外营力作用下土壤、土壤母质及其它地面组成物质如岩屑、松散岩层等，被破坏、剥蚀、运转、沉积的过程。

When the poisonous pesticide is degraded, it is likely pollute soil and water. If the underground water level is within 6 meters to the ground, the eluviated pesticide may pollute the underground water. Thus we have to be cautious when using pesticide

一切的化合物都具有毒素，当施药隐埋后应考虑到农药对土壤、水体降解过程中，药剂施用毒土形成后的向下淋溶径流降解，当地下水位距地面6米范围内时，向下淋溶径流降解的农药就有可能对地下水造成污染，故所应持极其注重态度对待。

The objective standards of the EST risk assessment include pipe buried depth, frequency of going on a tour of inspection, amount of cars or trains to get by, thickness of the pipe or tank, occupied rate of the earth's surface on the pipe, depth of the corrosion pit, working time, soil resistively, MAOP, soil I〓, accident frequency, current velocity of river water, cutting down rate of the riverbed, fallback rate of the river bank, distance of the upper reservoir, criminal rate, attaining goal rate, reliability level, GDP, population amount, combustibility N〓, toxicity N〓, long-term danger RQ and so on.

专家评分法的客观性指标有管道埋深，巡线频率，日车辆通过数量，管道和罐的厚度，管道上方地面被占用率，腐蚀坑深度，服务年限，土壤电阻率，最大操作压力，土壤塑性指标I〓，事故频率，河水流速，河床下切率，河岸后退率，上游水库的距离，犯罪率，达标率，可靠度，国民生产总值，人口数量，易燃性N〓，毒性N〓，长期危险性RQ等。

Experiments is located at Yucheng Comprehensive Experimental Station, Chinese Academy of Sciences, Yuchen County, Shandong Province (Latitude: 36°57′N, Longitude: 116°36′E, and Altitude: 20m) in 2000～2001 and 2001～2002 winter wheat growing seasons. Mainly observed factors under sprinkler irrigation and surface irrigation conditions include (1) dry and wet bulb temperature and wind speed at four heights, radiation, soil temperature and water surface evaporation of 20cm standard pan on the top of canopy;(2) winter wheat tillering, stem height, leaf area, biomass and yield; and (3) soil water content and winter wheat evapotranspiration.

实验在中国科学院禹城综合试验站进行，主要观测内容包括：（1）喷灌和地面灌溉条件下近地面不同高度处的温度和湿度、辐射、地温和冠层顶部水面蒸发量等农田小气候要素；（2）叶面积、生物量和产量等作物生长要素；（3）土壤水分变化过程、农田蒸发过程和冬小麦耗水量等要素。

The deformation of the wheel was defined through finite element method, and according to analysis method for elastic tyre in terramechanics, the draw bar pull force of spring wheel on lunar soil was computed and compared with that of rigid wheel. The result shows that the spring wheel can improve the lunar rover mobility performance.

通过有限元分析得到了载荷作用下的车轮变形，借鉴车辆地面力学中对弹性轮胎的分析方法，计算了车轮在月球表层松软土壤上行走时的挂钩牵引力，并与同等尺寸的刚性车轮进行了对比，分析表明弹性车轮结构将提高月球探测车行走性能。

Duration of inversion temperature near ground surface is longer, air temperature is lower, air humidity is higher and water surface evaporation of 20cm standard pan on the top of canopy is generally lower under sprinkler irrigation condition than those under surface irrigation condition.

喷灌跟地面灌溉相比，喷灌条件下近地面出现的逆温时间长，空气温度低，离地面1～4米高度范围内空气湿度大；冠层顶部20cm蒸发皿水面蒸发量小；喷灌条件下0～60cm土层内土壤含水量较高且变幅较小，白天地表温度低，晚上地表温度高。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失