1. 猶豫;遲疑;躊躇
    If you hesitate, you do not speak or act for a short time, usually because you are uncertain, embarrassed, or worried about what you are going to say or do.

    e.g. The telephone rang. Catherine hesitated, debating whether to answer it...
           電話響了。凱瑟琳猶豫了一下要不要去接。
    e.g. She hesitated a long time and then she said 'Yes'.
           她猶豫了很長時間，然后才說“行”。

2. （因有顧慮而）不愿意（做某事）
    If you hesitate to do something, you delay doing it or are unwilling to do it, usually because you are not certain it would be right. If you do not hesitate to do something, you do it immediately.

    e.g. Some parents hesitate to take these steps because they suspect that their child is exaggerating...
           一些家長不愿意采取這些措施，因為他們懷疑自己的孩子在夸大其詞。
    e.g. I hesitated to apply the word 'vulnerable' to him but it came into my mind...
           我不愿用“脆弱”這個詞來形容他，但它卻突然出現(xiàn)在我腦子里了。

3. 盡管給我打電話/ 盡管和我們聯(lián)系
    You can use hesitate in expressions such as 'don't hesitate to call me' or 'don't hesitate to contact us' when you are telling someone that they should do something as soon as it needs to be done and should not worry about disturbing other people.

hesitate的近義詞

    e.g. In the event of difficulties, please do not hesitate to contact our Customer Service Department...
           如果遇到困難，請盡管和我們的客戶服務(wù)部聯(lián)系。
    e.g. Please don't hesitate to tell either Mr Schrader or myself should you feel ill again...
           如果你再覺得不舒服，請盡管告訴施拉德爾先生或我本人。