a stitch of

例句：

1. 1.She had a stitch of thread in her dress.
   她的衣服上有一撮线。
2. 2. I need a stitch of this shirt to fix it.
   我需要这件衣服的一撮来修补它。
3. 3.He gave me a stitch of advice on how to solve the problem.
   他给了我一些建议，帮助我解决了这个问题。