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来源:雅诚德英语网
Limestone is usually mined in vast open-cast quarries, many of which will also carry out some processing of the materials.
石灰石通常在大型露天采石场开采,其中,许多还将进行一些材料的处理。
Limestone is usually mined in vast open-cast quarries, many of which will also carry out some processing of the materials.
石灰石通常在大型露天采石场开采,其中,许多还将进行一些材料的处理。