When the second knife face is designed to be a non-linear face, the second knife face can be an inner cavetto line or an outer cavetto line;

当第二刀面 设计成非线性面时，可以是内凹弧线或者是外凸弧线；

youdao

I poke the knife at him, at his fat stomach, lightly poking it with the tip, but he's wearing a puffy North Face jacket, so it doesn't stab him.

我把刀顶着乔肥肥的肚子，用刀尖轻轻地戳了戳他，乔穿着一件鼓鼓的乐斯菲斯夹克，一点感觉也没有。

youdao

Then the second door opened and his friend, Lord Ruthven, stood there. He had a knife in his hand. His face was red, and he looked very angry.

接着，第二扇门打开了，他的朋友--鲁斯温勋爵站在那儿。他手里拿着一把刀。他的脸红红的，满脸怒容。

youdao

"A basic v-chisel is useful when you are making lines on the pumpkin's face, and a good sharp kitchen knife that is not too flexible is best to carve the features, " he says.

CNN: Carving up a spooky Halloween

Those convicted under the knife crime proposals, announced on Wednesday evening, would face four-month detention and training orders.

BBC: Life sentences 'to be mandatory for more crimes'

The 76-year-old suffered serious head injuries, slashes to her face and two broken arms after being struck with a bat and a knife.

BBC: Derek Clark admits attempting to murder Mary Coulter