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...
Widespread epidemics in birds increase opportunities for human exposure.禽类中的广泛流行增加了人类暴露的机会.The epidemics usually stop when the summer rainy season begins.时疫通常在夏季雨季开始时停止传播....the protection of mankind against the forces o...
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 ...