The use of machinery has superseded manual labour.机器的使用已经取代了手工劳动.Flintlock: Ignition system for firearms early 16 th century, It'superseded the matchlock and the wheel lock.燧发机: 火器点火系统,始于16世纪初, 取代火绳机和转轮打火机转轮打火机.Hand...
His dog is too wild, so it is hard to keep under control.他的狗太野了, 所以很难去控制它.We should try to keep under control and put it to the best use of mankind.我们应该使之置于我们控制之下,使其为人类发挥出最大作用....