英汉词典

1. 刃；锋
    The blade of a knife, axe, or saw is the edge, which is used for cutting.

    e.g. Many of these tools have sharp blades, so be careful.
           这些工具中很多都有锋利的刀片，务必小心。

2. （螺旋桨的）叶片
    The blades of a propeller are the long, flat parts that turn round.

3. 桨叶
    The blade of an oar is the thin flat part that you put into the water.

4. （草的）叶片
    A blade of grass is a single piece of grass.

5. see also: razor blade;shoulder blade. rotor blade
     -> see rotor