大师作文网英语翻译laser is a kind of light and also a form of energy.a las
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英语翻译
laser is a kind of light and also a form of energy.a laser beam is made up of very short waves .these waves all have the same wave length.the laser beam keeps going on and off all the time ,and the time whewn the laser beam is off is much longer than it is on .as these changes are very fast,we can't see them .duing the time when the laser is off ,the energy for the next burst of light is being built up,so wen the beam is on the again,it will be a short burst.
laser is a kind of light and also a form of energy.a laser beam is made up of very short waves .these waves all have the same wave length.the laser beam keeps going on and off all the time ,and the time whewn the laser beam is off is much longer than it is on .as these changes are very fast,we can't see them .duing the time when the laser is off ,the energy for the next burst of light is being built up,so wen the beam is on the again,it will be a short burst.
激光是一种光,也是一种形式的能源.激光束是由很短的波形成.这些波均拥有相同的波长.激光束一直持续产生和消失,激光束消失的时间比产生的时间长很多.因为这些变化是非常快的,所以我们看不见.激光消失的同时,也在积累下一道光爆发的能量.因此激光的再次产生是一个很短的爆发.
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