In this paper, it is introduced that vibration velocity of the fans which used in cement plants cannot accurately show the running-condition of them by measuring and analysing.
介绍了通过测量分析发现利用振动速度并不能准确地反映水泥厂大型风机的振动状态。
Many patients have sporadic angina and some patients cannot accurately recall the time when symptoms began. So sometimes it is very difficult.
许多患者有突发心绞痛，也有部分患者不能准确地回忆起症状开始发作的时间，所以有时候评估缺血时间是非常困难的。
Atom can be accurately described though we cannot see it.
即使我们看不见，我们还是可以精确地描述原子。
Atom can be accurately described though we cannot see it.
即使我们看不见，我们还是可以精确地描述原子。
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