Customary is used to describe things that people usually do in a particular society or in particular circumstances.
usual , traditional
It is customary to offer a drink or a snack to guests.
给客人一杯饮料或一份小吃是一种习俗。
They interrupted the customary one minute's silence with jeers and shouts.
他们大声嘲笑叫喊,打破了惯例的一分钟肃静。
Customary is used to describe something that a particular person usually does or has.
Yvonne took her customary seat behind her desk.
伊冯娜坐在了她的书桌后面常坐的位子上。