双语例句
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证明了非退化二次曲线切点弦方程的两个定理.
In this paper , two theorems on chord at contact equation a nonsingular conic have been proved.
chord of contact
证明了非退化二次曲线切点弦方程的两个定理.
In this paper , two theorems on chord at contact equation a nonsingular conic have been proved.