by fits

英文造句：

1. The song the little girl sang by fits was of a strangely sweet sound.
   小女孩斷斷續續唱出的這首歌異常優美。
2. My watch goes by fits and starts.
   我的手錶走走停停。
3. She did everything by fits and starts, but stuck to nothing long.
   她做事總是憑一時高興，什麼事都乾不長。