It's polite to cover your mouth when you cough. 咳嗽的时候挡着嘴是种礼貌。
The student is very polite to his teacher. 那个学生对老师很有礼貌。
VERB. 叩头;磕头；卑躬屈膝；唯命是从. If you say that someone kowtows to someone else, you are criticizing them because they are too eager to obey or be polite to someone in authority.
He couched his demands in very polite terms.
他用十分委婉的措辞表达了他的要求。
It's a polite answer.
这是礼貌的答复。
※One never loses anything by politeness. 有礼貌对自己不会吃亏。 ※The truest politeness comes from sincerity. 真正的殷勤出于真诚。
