1.Philip began to scoop grain into his polythene bag.
飞利浦开始用铲子往塑袋里装粮食。
2.This polythene sheet should serve to keep out the rain for a while.
这种乙烯塑应该可以挡一会儿雨。
3.Three-dimensional flow field in the elutriator of polythene packed system is simulated based on the standard k-e model provided by FLUENT, is studied firstly to improve the separation efficiency.