Definition
Something that no longer exists or occurs; belonging to a previous era.
逝去的事物
Using traditional black and white televisions is a thing of the past.
使用传统的黑白电视机已经是过去的事了。
With the prevalence of smartphones, using public phone booths is now a thing of the past.
随着智能手机的普及，使用公共电话亭现在已经成为过去。
Students used to look for information in libraries, but that is now a thing of the past.
学生们过去常常在图书馆查找信息，但现在这已经成为过去。