这一类群，包括像剑龙和三角龙这样有名的名字，是恐龙被分成的两个分支之一。
This group, which includes such famous names as Stegosaurus and Triceratops, is one of the two clades into which the dinosaurs are divided.
萨克斯元帅希望给法国骑兵装备剑刃三角截面的剑，使士兵只能刺击。
Marshal Saxe wished to arm the French cavalry with a blade of a triangular cross section so as to make the use of the point obligatory.
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