slow to speak or act because you feel uncertain, embarrassed or unwilling 犹豫的；踌躇的；不情愿的
a hesitant smile
勉强的微笑
the baby’s first few hesitant steps
婴儿最初的迟疑的几步
~ about sth
She’s hesitant about signing the contract.
她对是否签这个合同还犹豫不决。
~ to do sth
Doctors are hesitant to comment on the new treatment.
医生们不愿对新疗法作出评论。