Eng

Convention...

套

Case, Coat, Convention, Cover, Covering, Envelope, Form, Formula, Harness, Jacket, Model, Noose, Pattern, Put on, Sheath, Slip, Snare, Suit, Tightly, To trick, Trap, Wear, Wrapper

約定俗成

Common, Convention, Custom

(Agree, Agreement, Appoint, Arrange, Promise)

慣例

Convention, Practice

公約

Convention