Polythene mulching的用法和样例：
例句
- Mulching is one of the best things people can do for their plants.
农地膜是农民为植被做的保护最好之一。 - In contrast, the imperforate film mulching method is a way to cover the topsoil with the film fixed by compacted soil on its ends when the crop is planted beside the film.
地膜覆盖无孔种植法，用地膜平铺于表土，边沿用土压紧封闭，将庄稼种在地膜旁边，膜下土壤中的水分和热量不易散失，却容易吸收外界水分，因此，庄稼增产不比传统覆盖法少。
