a grey beard的用法和样例：
- The last student was named Fan Chin.He was thin and pallid with a grey beard.
- A grey squirrel is scampering from limb to limb.
- The bridegroom was dressed in a grey suit.
- A grey crane flew onto the tree.
- As they slowed down for the turn, a grey car shot ahead of them.
a grey beard的相关资料：