An established form, rule, or custom, especially one followed merely for the sake of procedure or decorum.

被确认的形式、规则或习俗，尤指仅仅是因为程序或礼仪需要而遵循的。

youdao

An established form, rule, or custom, especially one followed merely for the sake of procedure or decorum.

被确认的形式、规则或习俗，尤指仅仅是因为程序或礼仪需要而遵循的。

youdao