Use a whetstone to sharpen the knife.

使用磨刀石使刀锋利。

To sharpen on such a whetstone.

用磨刀石磨利。

Emulation is the whetstone of wits.

竞赛是智力的磨刀石.

Competition is the whetstone of talent.

竞争磨炼才能。

Thefinest edge is made withtheblunt whetstone.

是磨刀石上镰刀的霍霍声。

The finest edge is made with the blunt whetstone.

最好(锋利的)刀口是由钝的磨刀石磨成的.

A mind needs books like a sword needs a whetstone.

要保持剑的锋利就得时时磨拭，要保持头脑灵光就得看书。

With justice as its whetstone, the multiverse shall achieve perfection.

以正义为其磨刀石, 多宇宙将可到达完美的地步.

The finest edge is made with the blunt whetstone. JOHN LYL.

最锐利的锋刃是从粗糙的磨刀石上磨出来的。

A fine - grained whetstone for giving a keen edge a cutting tool.

人能用青铜做成一种刃口锋利的切削工具.