a bicycle bell的用法和样例：
- Just then a bicycle bell rang out behind her. "Ah!" she exclaimed as a young cyclist flashed past.
- He is learning to ride a bicycle.
- It's uphill work learning to ride a bicycle.
- This hill is too steep to ride up on a bicycle.
- She is too little to ride a bicycle.
- A bicycle is a real boon when you live in a small town.