break an/ one's appointment 违约, 失约
have an appointment with sb. at要在某时间和某人有约会
keep an /one's appointment 守约
make/ fix an appointment with sb. 与某人约会
by appointment 按照约定, 照章
hold an appointment 担任某职
appoint sb. as/ to be… 任命某人为…
appoint sb. to do sth. 委派某人做某事
