削木需要非常精准和平滑，甚至一根头发丝的缝隙都不能有。

The cutting should be so precise and smooth that even a thread of hair cannot slip through the cracks.

youdao

削木需要非常精准和平滑，甚至一根头发丝的缝隙都不能有。

The cutting should be so precise and smooth that even a thread of hair cannot slip through the cracks.

youdao