英 [ble?d] 美 [bled]
1.N-COUNT The blade of a knife, axe, or saw is the edge, which is used for cutting. 刃
例：
Many of them will have sharp blades.
他們很多都會有鋒利的刃。
2. N-COUNT The blades of a propeller are the long, flat parts that turn around. (螺旋槳的) 槳葉
3. N-COUNT The blade of an oar is the thin flat part that you put into the water. (船槳的) 槳葉
4. N-COUNT A blade of grass is a single piece of grass. 草葉