lubber line

常見例句

Based on the geometry characteristics of Bertrand surfaces, the complicated surface conjugation issue can be discussed with their directrix line.
基于白川德曲面的幾何特征，將復(fù)雜的曲面共軛問題歸結(jié)到準(zhǔn)線上來討論。
The surface generated by a straight line,the generator,passing through a fixed point,the vertex,and moving along a fixed curve,the directrix.
錐面由一條直線，即母線，通過一固定點(diǎn)，即頂點(diǎn)，沿一給定曲線，即準(zhǔn)線，連續(xù)移動(dòng)而產(chǎn)生的平面。