profit function for mining sand 开采每吨沙土所获利润函数
sand mining on river channel 河道采砂
sand mining plan 采砂规划
sand-mining 长江采砂
Punish the illegal sand mining 找准根源严打非法采砂
sand mining depth 采砂深度
instream sand mining 河道采砂
sand mining management 采砂管理
mining sand
开采砂
以上为机器翻译结果，长、整句建议使用 人工翻译 。
According to RBM, the minerals removed from the sand through mining comprise about 5% of the dunes' total volume.
CNN: South Africa dune mining whips up sandstorm
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