pnb造句

• Pnb is incorporated in india in 1894
  于年在印度注册。
• Comparison with the experimentally observed life time - 100 msec , the recombination time 900 fsec is quite short . thus we suggested a stable period of dozens msec for the pnb excitons
  这一现象与实验观察到的短寿命光诱致吸收峰结果相似，但在时间上900fsec短于实验的100msec 。