formal 正式的 礼仪上的
session 会议 meeting
The traitors went into secret session  before insurgence（起义 叛乱）.
conference 会议 讨论会
Anne had a conference with her son's  teacher to discuss his progress.
reception 接待 招待会
etiquette 礼节
I consulted a book of etiquette before I  attended the formal dance.
decorum 礼仪 ceremony
Tom found the decorum at the banquet to  formal and tedious.
banquet 宴会 盛会 feast
Mary served us a banquet that was fit for a  king.
bidding 邀请
ceremony 仪式
The wedding ceremony took place in a  garden.
ceremonial 仪式 正式的
ceremonious 隆重的 正式的 恭敬的 formal,  solemn
The symphony conductor took a ceremonious  bow.
unveil 开幕
Anne unveiled her painting at the opening  of the art exhibit.
celebrate 庆祝
We celebrated the New Year with a dance  party.
entertain 招待 娱乐 amuse
Dave is fun to be around. He alwayds finds  ways to entertain us.