knife-edged

例句：

1. 1.The knife was edged with a sharp blade.
   这把刀的刀刃很锋利。
2. 2.She had a keen eye for detail.
   她对细节非常敏锐。
3. 3. The pointed end of the sword was used to pierce through the fabric.
   剑尖用来刺穿布料。