地膜覆盖种植技术可大幅度提高作物单产水平，因而得以大面积推广应用，但用过的地膜不能及时回收，滞留在田间，对土壤及生态环境都造成了污染。
Plastic film laying on crop is widely used in China, but most of the used films are left inthe fields after harvesting, and pollution is made both to the soil and environment.
他已经种植了5万多棵树，覆盖了133个足球场那么大的面积。
He has planted more than 50,000 trees covering the size of 133 football fields.
也门的山脉被种植咔特的绿色梯田覆盖着，咔特这种有轻微麻醉效果的植物占了整个国家大半的耕地。
The mountains of Yemen are covered in green terraces growing qat, a mildly narcotic plant that takes up more than half the country's arable land.
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