双平方 Bisquare

复方双嗪利血平片 Compound Reserpine Tablets

双平方根方程 double-square-root equation

双三方赤平晶族 ditrigonal equatorial class

对双方都公平 fair to both sides

双正方赤平晶族 ditetragonal equatorial class

叠前双平方根算子 prestack double square root operator