stammering

例句：

1. 1. He stammers when he speaks in public.
   他在公众场合讲话时会口吃。
2. 2. She was stammering her words out loud.
   她大声地结巴着说出话来。
3. 3. The young man stammers a lot and struggles to express himself clearly.
   这个年轻人口吃很多，很难清楚地表达自己。