求翻译：共完成挖土方2500立方米，回填石方2688立方米，浆砌片石墙1792立方米，毛石混凝土挡水墙451立方米，完成投资70.68万元。是什么意思？

Completed a total of 2500 m3 excavation, backfill stonework 2688 m3, 1792 m3 mortar piece wall, rubble 451 m3 of concrete retaining wall, completed an investment of 706,800 yuan.

completed a total 2500 cubic meters, backfilling dug earthworks stone 2688 cubic meters, pulp chips first stone walls 1792 cubic meters, gross stone concrete walls 451 $706,800 cubic meters, completed an investment.

Altogether completes the earth excavation 2500 cubic meters, the backfill cubic meter of stone 2688 cubic meters, lays with mortar the piece stone wall 1792 cubic meters, the rubble concrete retention wall 451 cubic meters, completes invests 706,800 Yuan.

Completed digging earthworks 2,500 cubic stone 2,688 cubic meters of backfill, made of stone wall 1792 cubic stone concrete retaining wall 451 cubic meters of water, investment 706800 Yuan.

Completed digging earthworks 2,500 cubic stone 2,688 cubic meters of backfill, made of stone wall 1792 cubic stone concrete retaining wall 451 cubic meters of water, investment 706800 Yuan.