When someone asks me what business I am in, I become embarrassed. I stutter and stammer. My face feels hot.

当有人问我从事什么职业时，我感到很尴尬，脸发烫，结结巴巴地难以启齿。

youdao

I was trembling so hard, I thought I would stutter when I spoke.

我那时抖得很厉害，我觉得说话时都会结结巴巴。

《柯林斯英汉双解大词典》

I managed to stutter a reply.

我结结巴巴，好不容易应了一句。

《牛津词典》

He had a stutter.Yeah, I believe it is true.

他有结巴这一点，我相信是真的。

英国电影的魅力 - SpeakingMax英语口语达人

Since early childhood, I have spoken with a stutter.

NEWYORKER: Little Strangers

The receptionist, already oozing servility thanks to the five thousand baht I gave him an hour ago, starts to stutter when he sees Vikorn, who is by way of being emperor of these sois.

NPR: Excerpt: 'Bangkok Tattoo'