weak on his pins

• 腿有毛病

weak on his pins的用法和样例：

例句

1. His leg has been bad for a very long time.
   他的一只腿有毛病已经有很长时间了。
2. He finds it difficult to climb the stairs with his bad leg.
   他的一条腿有毛病，上楼梯很困难。
3. His reasoning is weak, even shabby.
   他的论证软弱无力，甚至可以说很拙劣。
4. He was unemphatic in his refusal.
   他的拒绝软弱无力。