Dull The blade of this knife is so dull that it will not cut a radish.

这把刀的刀锋太钝，不能切萝卜。

youdao

I have nothing but respect for the craftsman who made this knife, and Chinese handmade knife makers in general.

没啥可说的，只有对这把刀的作者表示敬意，同时向整个中国的手工刀匠致敬。

youdao

This knife needs sharpening.

这把刀需要磨了。

《牛津词典》

This knife needs sharpening.

这把刀需要磨了。

《牛津词典》