查询词典 water and soil

Both Li-6400 photosynthesis system and OS1-FL chlorophyll fluorometer were used to measure the photosynthesis characteristic and chlorophyll fluorescence parameters of Cerasus humilis plant under soil water stress.

采用Li-6400光合仪和OS1-FL调制荧光仪分析研究了水分胁迫下欧李的光合特性和叶绿素荧光参数变化特征。

Effects of time, water flux density, and distribution coefficients of metal ions on the migration and concentration distribution of heavy metal ions were also simulated in soil.

分析了时间、水的通量密度、金属离子的吸附分配系数对金属离子在土壤中迁移及浓度分布的影响。

In this paper, the soil, water, vegetation and climate factors for methane flux are analyzed and discussed.

由于学科的发展，近10 a在这方面的研究较之过去更为全面和系统。

The Forestation Project in China had been implementing since 1999 and it aimed to control soil and water erosion.

以控制水土流失为主要目的的退耕还林工程是近年来我国政府启动的一项超大型生态建设项目。

This natural geographic location and specific climatic conditions, so that here the air, soil and water pollution were not any.

这天然的地理位置和特定的气候条件，使这里的空气、土壤和水质均无任何污染。

A preliminary study on laws of soil and water losses in gneiss, which is the main type of rocks in Taihang, was carried out in this paper on the bases of examination data, survey of flood and historic statistic data.

根据试验观测数据和洪水灾害考察结果，结合历史统计资料，对河北太行山的主要类型岩石－片麻岩低山区的水土流失特点进行了初步研究。

In this paper the conflicting discussion of scholastic view-point on seepage force which has lasted many years is stated. Then the physical concept of seepage force and its related forces including the resolved two components (a seepage force and a buoyant force) from seepage resultant force, the transformation between the seepage force and boundary pore water pressures, schematic diagram of forces acting on unit soil mass and the mathematic proof by Green theorem are described.

追述了多年来对渗透力学术观点的争论，并再就此问题论述了渗透力的物理概念及其与之相关的各力（包括渗流作用合力及其分解成的两个分力，渗透力与周边孔隙水压力的转换关系及各力作用在单位土体的图示；从数学上引用格林公式，证明土体表面水压力与土体本身渗透力之间的转换关系。

Mr. Zhang took soil and water samples and posted pictures of the dying bamboo groves on his Web site.

张先生采集了土壤和水的样本，并在个人网站上发布了枯死的竹林照片。

The area of Tongzhou zone is 912.34sq.km; it is located at the fluvial plain of Yongding River and Chaobai River; the average altitude above sealevel is 20m; the hypsography is plain, the soil is fertile, and there are many rivers and plenty of water; it belongs to warm temperate zone territoriality subhumid monsoom climate, its annual sunlight is 2730 hours, annual average temperature is 11.3℃.

通州区面积912.34平方公里，地处永定河、潮白河冲积平原，平均海拔高程20公尺，地势平坦、土地肥沃、多河富水，属于暖温带大陆性半湿润季风气候，年日照2730小时，年平均气温11.3℃。

Furthermore,the method to calculate the water characteristic curves in aerated zone are verified by in-situ data,and the modeling for imbibition and drainage test in 4 kinds of soil with different characteristics is performed.

用现场试验资料检验了求包气带土壤水分特征参数方法的有效性，同时对4种土质的脱湿与吸湿试验进行了模拟计算。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。