建立了砂轮的球基渐开螺旋面方程和分度球面螺旋线方程,给出螺旋运动参数、螺旋线导程.The mechanism of grinding internal gear of spherical worm emery - wheel is researched.正圆锥螺旋面是正圆柱螺旋面被同轴正圆锥面截得.The ortho cone helicoid was used interrsect intercept by the ortho con...
If the meat is marbled with fat it should be tender.如果是五花肉的话，应该比较嫩。Her skin is very tender, like a baby's.她的皮肤像婴儿一样的柔嫩。My tummy felt very tender...我的肚子一碰就很疼。Tender, incomparably delicious in crisp outside this kind ...
这个实用的基础模型较为简略地解释了人类的行为。This basic utilitarian model gives a relatively unsophisticated account of human behaviour.相关科学家对不同模型的结论给予不同的权重。The scientists involved put different weight on the conclusions of different models.你...