John's slight speech impediment made it difficult for his mother to understand him.
约翰轻微的口吃使他母亲难以听懂他。
It was a man with a speech impediment, and I began imitating him.
打电话的是个口吃的人，然后我就开始模仿他。
It's difficult to understand him because he has a speech impediment.
他的话很难听懂，因为他讲话口吃。
It's difficult to understand him because he has a speech impediment.
他的话很难听懂，因为他讲话口吃。
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