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来源:雅诚德英语网
Parallel rails had long been used in mining operations to move bigger loads, but horses were still the primary source of power.
在采矿作业中,平行铁轨早已被用来运送大件的货物,但马匹仍然是主要的运输工具。
Parallel rails had long been used in mining operations to move bigger loads, but horses were still the primary source of power.
在采矿作业中,平行铁轨早已被用来运送大件的货物,但马匹仍然是主要的运输工具。