The mahjong tiles blurred before her eyes. Her heart ached unbearably.牌在她的眼前晃动起来, 她的心痛得厉害.One stood up, while the others stared dumbly at their mahjong pieces.有的立起来, 有的呆呆的看着自己的牌.Oh , yes, that I shouldn't play too m...
This paper introduces a rarely seen method of describing with diametral distance.本文介绍了一种鲜为人知的用直径距离描绘椭圆的方法.Meshing spur gears must have the same diametral pitch.互相啮合的直齿圆柱齿轮,必须具有相同的径节.Diametral pitch : the number of teeth ...