例句與造句

1. based on the nonlinear paraxial equation and b-t theory, a differential equation, which describes the small-scale self-focusing in gain ( loss ) media has been derived . the change rule of the maximal gain frequency, cutoff frequency and integral exponential gain have been analyzed approximately
   我們首先從非線性近軸波方程出發(fā)，基于b-t理論的思想，在考慮了介質的增益(損耗)特性的情況下，推導得出了小尺度自聚焦所滿足的微分方程，并通過近似方法分析了最大增長頻率、截止空間頻率及積分指數(shù)增益等的變化規(guī)律。
2. It's difficult to find maximal gain in a sentence. 用maximal gain造句挺難的