以下为句子列表：
英文: 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.
中文: 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。
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英文: Laws of soil and water losses are bases to construct soil and water conservation forest, and are also the bases of management and development in mountainous areas.
中文: 摘要水土流失规律是配置水土保持林的依据，也是进行山区治理和开发的基础。
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