slowness

Hard working often counterbalances slowness at learning..勤奋往往能弥补智力的迟钝。

Despite the difficulty of the task,and the slowness of the progress,the workers continued to plug away at it manfully..尽管任务很艰巨，进展也缓慢，工人们仍顽强果断地继续干着。

This could not be otherwise ; and from the slowness of a vibration, or from the small number of vibrations in a day, Cavendish computed the real weight of the earth..就是用这样的办法，通过观察这缓慢的振动和计算一天中的振动次数，卡文迪什计算出了地球的确切的重量。