blade

1. N-COUNT The blade of a knife, axe, or saw is the edge, which is used for cutting. 刃

Many of them will have sharp blades. 他们很多都会有锋利的刃。

2. N-COUNT The blades of a propeller are the long, flat parts that turn around. (螺旋桨的) 桨叶

3. N-COUNT The blade of an oar is the thin flat part that you put into the water. (船桨的) 桨叶

4. N-COUNT A blade of grass is a single piece of grass. 草叶

Brian began to tear blades of grass from between the bricks. 布赖恩开始从砖缝儿里拔草叶。