农林专业英语英美人士写作例句及其句法词汇习惯分析.doc

1 Soil erosion can lead to reduction of soil fertility, loss of nutrients, and declines of crop yields in farmlands. 农田中发生的土壤流失会导致肥力下降，养分流失和减产。 2 In a review of mechanized agricultural systems in which wheat, corn, soybean, and barley were planted, Bakker et al. (2004, 2005) found that on average, soil erosion reduced crop productivity by about 4% for each 10 cm of soil lost. 在对机械化耕作的小麦，棉花，大豆，大麦土地的研究中，Bakker等人发现10厘米的土壤侵蚀会使作物减产4%。 3 As a consequence, sediment yields and leaching of pollutants into surface water can lead to degradation of important aquatic habitat, affect recreational uses of water, and introduce toxins into the human food chain ( Gitau et al., 2005). 因此，土壤的沉积于污染物浸出液都会对水生生态系统造成破坏，影响水体涵养，使有毒物质进入人类的食物链。 4 As one of the major BMPs in BBW, the flow diversion terraces (FDT) system has been implemented on more than 50% of cultivated lands in the watershed. 作为一项主要的BMP措施，在BBW流域中集流梯田的面积占到耕地面积的50%以上。 5 For instance, SWAT was used within the Hydrologic Modeling of the United States Project (HUMUS) to conduct a national-scale analysis of the effect of management scenarios on water quantity and quality (Jayak-rishnan et al., 2005; Gassman et al., 2005 ). 比如，其被全美水文模拟计划(HUMUS)使用，以阐明国家范围内不同水质管理情境下的水体质量与数量。 6 Therefore, it is necessary to assess the impacts of FDT on water quality at a watershed level by using integrated hydrological models. 因此，在流域尺度上使用综合的水文模拟方法评估FDT对水质的影响是必要的。 7 The objectives of this research was to calibrate the SWAT model for the BBW with limited FDT by comparing monthly predicted and measured water quality indicators (water yields, sediment yields, nitrate, and soluble phosphorous) under Maritime climate and soil conditions 该研究的目的是基于月的预测与实测数据（包括水沙量，硝酸盐和可溶性碳）率定在有限使用的FDT下BBW内SWAT 模型。 8 Annual rainfall, snowfall, precipitation, and daily temperature averages are 768.9 mm, 353.5 cm, 1091.5 mm, and 3.28C, respectively. 年降水量（包括降雪和降雨），平均温度分别为1091.5mm ，353.5mm，768.9mm，3.2摄氏度。 9 The period from December to March contributes 80% of the snowfall, which he