例句與造句

1. By means of discussing plane symmetry that relates to point , curved surface and curve in a three - dimensional space , this paper gives a method to study point 、 curved surface 、 plane symmetric point on a curve 、 symmetric curved surface and symmetric curve equation
   摘要討論了三維空間中，點(diǎn)、曲面、曲線關(guān)于平面的對(duì)稱問題，從而給出了求點(diǎn)、曲面、曲線關(guān)于平面對(duì)稱的對(duì)稱點(diǎn)、對(duì)稱曲面、對(duì)稱曲線方程的方法。
2. It's difficult to find symmetric point in a sentence. 用symmetric point造句挺難的