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....
我们在南美洲为一些大公司探测石油和矿石。We dowse oil and ore in South America for big companies.这机器每小时可以破碎多少吨矿石?How many tons of ore can this machine crush in an hour?他们从矿石中提炼出黄金.They refined gold out of the ore....
...a certain mistimed comment.不合时宜的评论The horse completely mistimed the jump and threw its rider.这匹马起跳完全不是时候，把骑手摔了下来。mistimed publicity不合时宜的宣扬She mistimed the marathon runner.她给马拉松运动员计时时出现了计时错误.a mistimed visit不合时宜的访问...
The betaine will collapse to the alkene only when these two functions are eclipsed.只有当这两个基团移至重迭位置时碘盐才能裂解为烯烃.The gramophone had been eclipsed by new technology such as the compact disc.激光唱片等新技术使留声机黯然失色。Our happiness was s...