formalities
Formality is very correct and serious speech or behaviour that is used especially in official situations.
Lillith's formality and seriousness amused him.
莉莉斯的正式和严肃让他觉得很逗。
If you say that an action or procedure is just a formality, you mean that it is done only because it is normally done, and that it will not have any real effect on the situation.
Some contracts are a mere formality.
有些合同纯属走形式。
Formalities are formal actions or procedures that are carried out as part of a particular activity or event.
They are whisked through the immigration and customs formalities in a matter of minutes.
他们在短短的几分钟内就很快走完了入境和通关程序。