必須知道

必須 biˋ xuˉ

(Had to, Had to be, Has to, Have to, Have to be, Having to, Must, Obligatory, To have to) Obligatory, Must, To have to, Have to, Has to, Having to, Had to, To have to be, Have to be, Has to be, Having to be, Had to be

須知 xuˉ zhiˉ

(Policy) Policy

知道 zhiˉ daoˋ

(Knew, Know, Knowing, Known, Knows, To know) Known, To know, Know, Knows, Knowing, Knew