查询词典 infertile soil

Radioactive decay of radium-226, found in a wide variety of rocks and soil.

这种氡可以在很多种类的石头和土壤中找到。

Surface and core soil samples collected from a radioactively contaminated region are analyzed by y spectrometry.

采有γ能谱法一批放射性污染的环境土壤样品进行了定量分析。

The level of radioactivity in the soil was found to be above recommended limits.

土壤的辐射水平被发现超过规定的限度。

Radon is the crust of rock, soil radioelement arising from the decay of a radioactive inert gases, which are mainly the lungs and bronchial have on the human body radiation.

氡是地壳岩石、土壤中放射性元素衰变而产生的一种放射性惰性气体，它主要是对人体的肺和支气管产生辐射作用。

One, in fact, almost all taken from the natural rock, used to bake the tiles in the soil, more or less contain a certain amount of radioelement, of course, will not cause radioactive danger, when more than a certain amount of radioactive material, would pose a threat to human health.

一、事实上，几乎所有采自大自然的岩石、烧制瓷砖用的泥土等，或多或少都含有一定量的放射性元素，当然，并非都会对人体造成放射性危害，只有当放射性物质超过一定数量时，才会对人体健康造成威胁。

This indicates that the theoretical formula can be used to study the transportation and distribution of radon in soil.

实验成果表明，理论公式可以用于氡的运移与分布状态的研究。

Based on RAGA, the author applied the multi objection planning model to soil and water conservation of small watershed named Xinglong in Songnen plain. The result is good, and the paper can provide a new method for readers who engaged in correlative research.

在建立松嫩平原兴隆小流域水土保持多目标综合优化模型中得以应用，取得了满意效果，为该方面研究提供了新的思路与研究模式

At last, some advices on project of water and soil conservation in railroading engineering is put forward.

其中，铁路工程是一项浩大的土木工程，由于在施工程过程中，会穿过各种各样的地貌和地形单元，这势必会给所经之地的环境带来一定的影响。

The practical effects of the present prevention measures to soil erosion in the railroading engineering are studied, from which sime problems are found.

近年来，我国各项基础设施及新兴产业的开发建设，都对我国的水土保持工作提出了新的任务和更高的要求。铁路工程的建设施工便是其中的一个典型。

Because distribution of annual rainfall amount year by year,are cruelly nonuniform,soil water resources are basically important on the growth and development of plants.

土壤水是重要的生态水源和水文要素之一，黄土高原位于干旱半干旱地区，降水量的年际变化大和季节分配极不均匀，土壤水资源对植物生长发育的影响尤为重要。

You can snipe the second and third union leaders from this position.

您可以鹬第二和第三工会领袖从这一立场出发。

Aiming at the currently shortage of XML streams quality detecting, this paper proposes a new forecasting method of XML streams quality by least squares support vector machines, which is used the method of XML keys' vector matrix as windows, and vector product wavelet transform to multilevel decompose and refactor the XML streams series, that can fulfill real-time checking demand of XML quality, and ensure constraint, consist- ency and integrality. For even more adapting net load, it proposes a control strategy by weight and adaptive adjustment to ensure XML streams quality.

针对当前XML数据流质量检测存在的不足，提出构建XML键的矢量矩阵作为窗口，利用矢量积小波变换多级分解与重构XML数据流，再结合最小二乘支持向量机对XML数据流质量进行预测的一种方法，满足XML数据流质量重构时实时检测的要求，保证XML数据的约束性、一致性与完整性；为了更好的适应网络负载，采取加权与自适应窗口调整等调度策略充分保证XML数据流的质量检测。