hum and haw (or ha) hesitate; be indecisive. British
☞ The word hum has been used as an inarticulate syllable in hesitant speech since Chaucer; ha appears in a similar role from the early 17th century.
英语词组固定搭配大全包含15956条英汉双解词组,基本涵盖了全部常用英文词组、短语的翻译及用法,是英语学习的有利工具。