a rickety cart的用法和样例：
- I was working at a rickety table.
- I parked my “rickety cart“,and I immediately knew I would do more than sit with you in silence.
- The unity of the other five countries in dealing with Pyongyang is a rickety structure built of conflicting aims.
- In the Macphails' there was nothing but a poor, worn bed with a ragged mosquito net, a rickety chair, and a washstand.