“磨石”造句

他在磨石上磨快了他的刀刃.
He sharpened the edge of his knife on a grindstone.

难道绕来绕去,绕到磨石口来了吗 ?
Could it be that all these detours had brought them to Moshi Pass?

它调节的是石磨的输出,而不是磨石的马力.
It regulated the output but not the power of a millstone.