If you’re unsure, ask the customer to spell their name.
Police were unsure of the motive for the killing.
I was unsure whether to leave.
She was unsure how to tell him.
英语词典包含67175条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。