... 地形线 form line; formlines; watershed line 蝶形线butterfly curve 杆形线 bar line; barline ...
双语例句
1
Perhaps a butterfly find someone to track it, maybe it was intentionally funny I play, always curve to fly to the front.
也许是蝴蝶发现有人跟踪它，也许它是故意逗我玩，总是曲线地飞往前方。
2
Applying the theorem to conical curve, one can get a new "Butterfly Theorem" which makes up for the deficiencies of the classical one and widens its scope of application.