我国水土流失一部分因森林作业而产生。
In our country, part of soil erosion is caused by forest operations.
公司将生产力低下的原因归咎于矿山的关闭，更高的劳工流失和支付上涨的矿业作业。
The company blamed lower productivity due to mine shutdowns, higher labor turnover, and pay increases for mining jobs.
通过对洗矿作业的查定及产品粒度组成和回收试验结果的分析，论证从溢流中回收流失的锰矿物的必要性和可能性。
After checking the whole ore-washing process, and analysing the particle size and the experiment results, this paper shows the necessity and possibility of recovering the lost Mn.
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