polar subnormal造句
例句與造句
- *B . Williamson " Subtangent and Subnormal " and " Polar Subtangent and Polar Subnormal " in " An elementary treatise on the differential calculus " ( 1899 ) p 215, 223 Google books
- It's difficult to find polar subnormal in a sentence. 用polar subnormal造句挺難的