reject material是什么意思 reject material怎么读
reject material的用法和样例
- There is a heap of waste material in front of the laboratory.
实验室前面有一堆废料。 - These methods are better than pollution control techniques that have to be applied after a waste material has become a potential pollutant.
这些方法比在废料成为潜在污染物之后，才采用的污染控制技术更为优胜。
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