We cannot too strongly urge upon you the importance of this matter.
对此事，我们无论怎样向你强调其重要性都不会过分。
But the step motor efficiency is low, the ability is not big, load drag pulse equivalent cannot too big, speed range is not big.
但步进电机的效率低，拖动负载的能力不大，脉冲当量不能太大，调速范围不大。
Too often we try to choose and control things we cannot. Too seldom we choose to control what we can …our attitude.
我们经常选择去做那些我们无法控制的事，却很少去选择我们可以控制的事——那就是我们的态度。
Too often we try to choose and control things we cannot. Too seldom we choose to control what we can …our attitude.
我们经常选择去做那些我们无法控制的事，却很少去选择我们可以控制的事——那就是我们的态度。
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