stutter
verb [ I ] uk/ˈstʌt.ər/ us/ˈstʌt̬.ɚ/
(SPEAK)
口吃，结结巴巴地说
to speak or say something, especially the first part of a word, with difficulty, for example pausing before it or repeating it several times
She stutters a little, so be patient and let her finish what she's saying. 她有点儿口吃，所以耐心些，让她把话说完。
[ + speech ] "C-c-can we g-go now?" stuttered Jenkins. “我，我们可，可，可以走了吗？”詹金斯结结巴巴地说。
Compare: stammer
(NOT SMOOTH)
断断续续地运转（或进行）
to work or happen in a way that is not smooth or regular
Suddenly the engine stuttered and then it stopped completely. 发动机突然突突响了两声，接着便完全停住了。