a fit of laughter的用法和样例：
- He burst into a fit of laughter.
- The remark sent him into a fit of laughter.
- His humour made us break out in a fit of laughter.
- It's a photograph in which I am outside in the full sun, my eyes crinkled tight and my cheeks about to burst in a fit of laughter.
- A fit of dizziness came over her.