他研究了摆线 、 圆外旋轮线和四点圆的旋轮线的几何性质.He investigates geometrical properties of cycloids , epicycloids, and hypocycloids.由于这个缘故,摆线又叫做等时曲线.For this reason the cycloid is called the tautochrone.分析摆线钢球行星传动减速器的振动特性.The vibration perfo...
" No , we mustn't use that money, Chiu , " Feng Yun - ching gasped in horror, creasing his brow.“ 元丰庄上那一笔存款是不能动的.In severe creasing the frictional resistance plays only a minor role in determining the crease resista...
可口可乐33厘升. 罐装,在瑞典交货.Coca Cola 33 cl . Cans with sticker in swedish text delivered to Sweden.厘升容积的公制单位,等于百分之一升 ( 10 - 2 )A metric unit of volume equal to one hundredth ( 10 - 2 ) of a liter.标准葡萄酒瓶的容量为75 厘 升.The standard wi...