a whetstone

He is sharpening a pair of blunt scissors with a whetstone.

他在用磨刀石磨一把不锋利的剪刀。

Putting your spouse down in front of others is a huge no-no in a relationship, said Whetstone.

惠茨通说，当着他人的面贬低配偶是婚姻与恋爱关系中万万不可做的事。

Outside every doorway is an old man or woman stripping bamboo shoots for dinner, or knitting, or sharpening a scythe with a whetstone; an Asian version of the world according to Bruegel.

家家户户门外都有一个老头或是老太婆在剥竹笋当晚餐，或在编织，或在磨刀石上打磨镰刀；这完全是一幅布鲁盖尔（bruegel）笔下世界的亚洲版。

And a mind needs books like a sword needs a whetstone.

好脑筋需要书本，就如同宝剑需要磨刀石。

To sharpen on such a whetstone.

用磨刀石磨利。

A fine-grained whetstone for giving a keen edge to a cutting tool. Don't mess around with sharp knives!

细磨刀石纹理细密的磨刀，可使切削工具刀刃锋利不要摆弄刀口锋利的刀！

The Xiata Grassland is as flat as a whetstone.

这夏塔的草原可真是平坦如砥呀。

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.