短語(yǔ)詞組短語(yǔ)elliptic plane geometry 橢圓平面幾何double elliptic geometry [數(shù)]二重橢圓幾何elliptic non -Euclidean geometry 橢圓型非歐幾何學(xué);橢圓型非歐幾何 返回 elliptic geometry