Kerfs
(kerf 的复数) n. 劈痕, 截口, 切口\\n[机] 锯口, 截口
🗣️ 情景例句
Yes, it's so easy.
没错， 它真简便。
Once a man and twice a child.
一次为成人，两度当小孩。
it is quite reasonable to regard the sea floor as the basic form of the crust of the earth,
因此完全有理由把海床看作地壳的基本模壳，