折率 meaning in English
discount rate
Examples
- The courses of the enhancement do n ' t damage iceland spar or change its physical properties , such as birefringence index , optic chatacter . these show that the samples measure up to their industrial standards after the heating . the experiment is successful
褪色后的冰洲石晶体外观完好，其双折率、偏光性等物理性质没有明显变化，完全符合它在工业上应用的要求，冰洲石的颜色改善取得了明显的效果。