agate knife-edge

例句：

1. 1. The artist used agate to create the knife-edge on his sculpture.
   这位艺术家用宝石制作了雕塑上的刀锋。
2. 2.The blade of the knife was sharp enough to cut through agate without damaging it.
   这把刀的刀刃足够锋利，可以切穿宝石而不损坏它。
3. 3.The museum exhibit showcased agate knife-edges from ancient civilizations around the world.
   博物馆展览展示了来自世界各地古代文明的宝石刀锋。