My father put up red couplets on the doors and red paper-cutting on the windows.
我父亲在门上贴了红色的对联，在窗户上贴了红色的剪纸。
He shut up after this, and went in to his paper, but the retort rankled in his mind. It was the first cutting remark that had come from her.
他就此闭上了嘴，回去看报了，但是这句反驳的话刺痛了他的心。这是从她的口里说出来的第一句尖刻的话。
By analyzing motion orbits of picks when a horizontal cutting head cuts, geometry models and motion equations are set up in the paper.
分析横轴式截割头摆动截割时截齿的运动轨迹，建立了其几何模型和运动方程。
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