dos
noun[plural]
uk/duːz/us/duːz/dos and don'ts
(alsodo's and don'ts)
rulesaboutactionsandactivitiesthatpeopleshould or should notperformor takepartin:
规定,规则;规矩Theteacherspenttenminutesexplainingall the dos and don'ts in theclassroom.老师花了十分钟解释课堂纪律。