This phenomenon may be explained qualitatively by means of free carrier absorption.

这一现象可定性地用自由载流子吸收来解释.

The free carrier part is exactly the famous Liouville equation which has an ana - lytical soluzion.

自由载流子部份正是著名的刘维方程,具有解析解.

Free carrier - FRC: Applies to goods delivered into the custody of the carrier at the named point.

指定地点承运人交货价：在指定地点向承运人交货的价格。