cutting teeth短语¹⁴⁴⁹⁷²⁺² 基本例句 切牙 Cutting teeth of noncircular gear is very difficult when without special machine tool for machining of noncircular gear. 在没有专用加工非圆齿轮机床的条件下，非圆齿轮的切齿问题是个难题。 cnki Cutting teeth isn't one of those milestones a baby reaches all at once. 不像其他的发育里程碑，宝宝的牙齿并非一次就长全了的。 yeeyan