They ground this rock up for road building.

他们碾碎这些石头用来筑路.

《简明英汉词典》

This machine crushes the rock up so that it can be used for road building.

这台机器能粉碎石头,可用来筑路.

《简明英汉词典》

This machine is used to crush the rock up for road building.

这台机器用于碎石,以供筑路之需.

辞典例句

The machine can crunch the rock up.

这台机器可作碎石之用.

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