传送带下沉重的钢滚筒the heavy steel rollers under the conveyor belt这个大齿轮带动小齿轮使滚筒旋转.This large gear turns the small one to rotate the cylinder.粉碎辊是波纹式滚筒, 还常是螺旋割纹式.These rolls are corrugated cylinders, usually of the spiral type....
这些参数导致了特定固定相的分离行为.These parameters contribute to the chromatographic behaviour of a particular stationary phase.方法使用薄层色谱法, 以硅胶 GF254 为固定相.Methods: TLC method was applied , the stationary phase was GF _ ( 254 ).考察了一些手性化合物...
汽车运输, 费用需方承担.Motor vehicle transport, cost of which be paid by the demander.供方可按需方要求,通过电话 、 网络、视频等提供技术指导.We will offer the technical support through call, internet if customer require.备注: 以上产品均可依需方规格要求生产.Note: The above ...
Brian kept up the idle chatter for another five minutes.布赖恩又絮絮地唠叨了5分钟。Lila kept up a steady stream of chatter.莉拉一直说个没完。Troy's chatter kept me from thinking dark thoughts.特洛伊的喋喋不休让我暂时收起了阴郁思绪。...
Sometimes I use breaststroke, backstroke, and free style.有时游蛙泳 、 仰泳和自由泳.I get water in my ears when swimming the backstroke.仰泳时,我耳朵总是进水.Peter : Tedhere are freestyle, backstroke, butterfly frog stroke and etc.有自由泳 、 仰泳 、...
When life gets hard and you want to give up, remember that life is full of ups and downs, and without the downs, the ups would mean nothing.当生活很艰难，你想要放弃的时候，请记住，生活充满了起起落落，如果没有低谷，那站在高处也失去了意义。Jem was full of beans after a l...