1. 习俗的;习惯的
Customary is used to describe things that people usually do in a particular society or in particular circumstances.
customary在线翻译
e.g. It is customary to offer a drink or a snack to guests...
向客人提供一杯饮料或一份点心是一种习俗。
e.g. At Christmas it was customary for the children to perform bits of poetry...
圣诞节孩子们总要唱一些圣诞颂歌。