You must be more polite to the customers.
It wasn’t very polite of you to keep interrupting me.
His refusal was firm but polite.
She forced a polite smile.
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。