例句與造句

1. through two-fluid and two-time-scale approximation, the dominating equations, which show the non-linear coupling between high frequency modulational field and the density disturbance of electrons and ions, are obtained
   這組方程描述了高頻調(diào)制場和電子、離子密度低頻擾動之間的非線性耦合。
2. It's difficult to find scaling approximation in a sentence. 用scaling approximation造句挺難的