2018年6月英语四级真题_2018年12月英语四级听力50篇：21 Soils

【导语】英语听力是英语四六级考试中的重要组成部分，对于中国的考生，日常英文听说机会少，缺少听力训练，所以在备考大学英语四级时，需要加强听力的训练。针对这一情况，英语四六级频道特别整理听力相关文章，供学员参考使用。预祝大家高分通过考试。

　2018年12月英语四级听力50篇汇总

　　Soils

　　There are many different kinds of soils. Different soils have different types of rock and minerals in them. Some soils have more water in them than others. Some soils might have more plant and animal material in them, too.

　　Different kinds of soils are found in different parts of the world. There are several kinds of soils found in the United States. In some areas, the soil has a lot of clay. Other soils are very sandy. Loam is a kind of soil that has a good mixture of clay and sand.

　　In some places, soil layers are very thick. Lots of plants grow in places with a thick soil layer. In dry and windy places soil layers are much thinner. Layers of soil on mountains are thin because gravity pulls the soil downhill.

　　The type of soil in a particular place affects what kinds of plants can grow there.

　　Useful Words:

　　1. clay 黏土，泥土

　　2. loam 肥土

　　3. layer 层

　　4. gravity 地心引力，重力

　　5. downhill 往下

　　2018年12月英语四级听力50篇汇总

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