long blade

例句：

1. 1. The long blade of the sword glinted in the moonlight.
   剑的长长的刃在月光下闪闪发光。
2. 2.He carried a long blade to protect himself during the night.
   他在夜晚携带一把长刀以保护自己。
3. 3. The long blade of the sword was sharp enough to cut through flesh.
   剑的长刃足够锋利，可以切断肉。