降雨

Acid rain: Sulphur dioxide emissions from coal use are leading to anincrease in the acidity of rain.

酸雨： 由于煤炭使用而造成的二氧化硫排放正在导致降雨中酸度的增长。

Van der Waal says the country has sufficient rainfall for extensive production of sugarcane, which is currently the most efficient crop for ethanol in terms of production cost, being much faster to process and producing more sugar than maize or sorghum.

能源专家说莫桑比克充足的降雨足够甘蔗的大量产出，就生产成本而言，由於甘蔗生产周期短，比玉米和高粱产糖量大，因而它是最有效的作物。

Van der W AA l says the country has sufficient rainfall for extensive production of sugarcane, which is currently the most efficient crop for ethanol in terms of production cost, being much faster to process and producing more sugar than maize or sorghum.

能源专家说莫桑比克充足的降雨足够甘蔗的大量产出，就生产成本而言，由于甘蔗生产周期短，比玉米和高粱产糖量大，因而它是最有效的作物。

The main contents are as follows:Firstly, starting with the general situation of soil erosion and the harms caused by it, the causes leading to the local soil erosion problem are analyzed comprehensively in the paper. And connecting with the measures taking place, sticking points towards the career of soil and water conservation are expatiated upon.Secondly, Back-Propagation Neural Network, One of Artificial Neural Network is used to set up a modal about the connection of the soil erosion modulus and seven factors impacts on it, such as, rainfall, rainfall largest intensity in 30 minutes, runoff coefficient, vegetation cover percent, rate of granule, rate of physical viscidity-clay, the rate of organic matter. Through the comparison with linear regression model, the second regression model, the Chinese Soil Loss Equation, it illustrated that BP Neural Network modal is more accurate than the other three modals in forecasting the mount of soil erosion, and the BP Neural Network will have some applicability in forecasting in soil erosion.

本文以霍山县作为皖西大别山区的典型区域，主要研究了以下内容：(1)从介绍霍山县土壤侵蚀状况以及所造成的危害入手，全面分析了导致当地土壤侵蚀发生的原因，并结合当地采取的水土保持相关措施，阐述了当地水土保持工作的症结所在；(2)结合上土市水土保持试验站多年实测资料和2005年实验资料，应用BP神经网络理论，建立了次降雨土壤侵蚀量与次降雨量、最大30min雨强、径流系数、植被覆盖度等因子之间关系的模型，并通过BP神经网络的预测模型与一次回归模型、二次回归模型、CSLE模型之间的对比分析，说明了建立的BP神经网络模型在土壤侵蚀预测可以取得较回归模型和CSLE模型更高的精度，也说明了BP神经网络理论在土壤侵蚀预报中具有一定的适用性。

Although forest canopy layer could prevent splash erosion effectively, clay was taken away by overland flow and run off easily, the erosion amount became less after removing the forest canopy and surface soil, while the splash erosion still produced in the surface layer; the splash function weakened after having water current, the starting particles were less than bareland, so removing the surface disturbed soil made the erosion amount and clay less, silty sand more than bareland, but unsteady, the wear and tear energy used by raindrop splash and current function for overcoming sediments separating and starting were comparatively large, sediments were very difficult to be started and transported, it explained that forest root systems could increase anti-erosion capability of forest vegetation, make rainfall-current system splash and export finer particles than bareland.

虽然林冠层能有效防止溅蚀的发生，但坡面流还是能带走粘粒部分，粘粒还是容易流失。去除林冠和表层土后，侵蚀量变得更少，但表层还是会被溅蚀，有水流后，溅蚀作用减弱，颗粒起动的比裸地的少，所以，去除表层扰动土后，侵蚀量更少，粉沙多，粘粒比裸地更少一些，但不稳定，雨滴击溅和水流作用用于克服泥沙分离起动损耗的能量较大，很难被起动输移，这说明森林植被根系的作用增加了林地植被的抗蚀力，使降雨一水流系统仅能溅起输出比裸地坡面更细小的泥沙颗粒。

However, the factors in this equation must be corrected, and the rainfall erosion factors with the time and space variation are more complicated especially.

但是，该方程的各个因子必须校正，特别是降雨侵蚀性因子随时空的变化尤其复杂。

Scientists believe that the best way for us to get solar energy is to collect it in outer space by sending a space station there.

科学家们确信，我们获得太阳能的最好办法是发送太空站到外层空间去收集。正在降雨的云块。

The function of pollution control dispatching with water gates in improvement of water quality is analyzed, and some suggestions are made on the improvement of water quality by further use of the water conservancy project, such as prevention of river water interception, improvement of the self-purifying capacity of rivers, reasonable dispatching and full use of floods for separation of wastewater.

与此同时，通过水利工程调度合理配置水量，最大限度利用水体纳污能力，也是改善水质的一项重要措施。1 概况淮河流域地处我国南北气候过渡带，降雨时空分布严重不均，水旱灾害频繁。

The results indicated that the surface salt contents in the spring of 2006 were the highest among the three samplings, the surface soil salt contents declined from spring to summer of 2006, and the change of surface soil salt contents was not obvious from summer to autumn/winter of 2006. The variation of surface soil salt contents was related to rainfall greatly.

土壤盐分浓度的变化与降雨量有密切关系，虽然2006年降雨偏多，但佛山市南海区农业集约化水平较高，部分菜地连年种植蔬菜、复种指数极高、化肥施用量偏大，从而在遇到干旱年份和季节，集约化露天菜地土壤仍有发生次生盐渍化的风险。

After suffering through the second-biggest February snow total on record, Madison braces for another winter mess starting tonight into Friday, with heavy rain being the main culprit of their weather woes this time, with rains that could turn the region into a skating rink by Friday morning.

经过痛苦之后的第二最大二月雪总记录麦迪逊大风今晚出发到另一个冬天一塌糊涂星期五、有大雨天气是罪魁祸首其疾苦此时，降雨将有可能成为一个区域的周五上午冰场。

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。