例句與造句

1. With time - evolution - operator , it is proved that the population of upper level is in circumstance of cyclic oscillation by laser pulses pair of gaussian line - shape in a homogeneous broadening two - level system . the oscillatory time oxide is the delay time between the laser pulse pairs and the oscillatory frequency equals the one of transition between the lower and upper level
   引入時間演化算符，證明均勻增寬二能級體系在飛秒激光脈沖對作用下上能級激發(fā)態(tài)布居是周期性變化的，它以飛秒脈沖對之間的延時為時間軸，以該原子能級之間的躍遷頻率為振蕩頻率
2. It's difficult to find pulse pairing in a sentence. 用pulse pairing造句挺難的