reflection coefficients的用法和样例：
例句
- The reflection and transmission coefficients of the plane wave at the birefringent surface were deduced.
导出了平面波在双折射介质表面的反射系数和透射系数公式。 - Negative coefficients occur where there is a decrease in acoustic impedance across the reflecting interface.
当反射界面上下两侧的声波组抗降低时，反射系数就会出现负值。
