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1·I am not a sharpening stone effect, can make kitchen knives sharp, although its own cut what. — Horace.

我不如起个磨刀石的作用，能使钢刀锋利，虽然它自己切不动什么。——贺拉斯。

2·The guy had set up his pedal-operated sharpening stone in one of the gloomy step-down doorways in the South End.

这伙计在南城一个阴暗的减缓的门道里安装了踏板操纵的磨刀石。

3·He bended over, with one hand grasping the holder and the other hand the tip, he let the knife go up and down on the stone and make the sound of sharpening.

他弓着腰，一手抓着刀柄，一手捏着刀尖，让刀在石头上来回游走，发出“霍霍”的声音。

4·He chose one large stone and began to hit one of the scrapers hard on the edge that needed sharpening.

他选了一个大块石头，在一个需要磨利的石刮子边沿上敲打起来。