歡迎/開幕/閉幕詞 (deliver/make) a welcome/opening/closing speech/address/lecture
開/閉/揭幕式 opening/closing/unveiling ceremony
舉行烈士紀念碑的揭幕典禮 unveil a monument to the martyrs
爲展覽會揭幕 inaugurate an exhibition
奠基典禮 foundation laying ceremony
開學典禮 school’s opening ceremony
畢業典禮 graduation ceremony /commencement
開國大典 founding ceremony of a state
婚禮 wedding ceremony
慶典 celebration
答謝宴會 return banquet
晚宴 evening reception/dinner
招待會/宴會 reception
冷餐招待會 buffet reception
聯歡/新年/篝火晚會 get-together/spring festival/campfire party
酒會 cocktail party
宣佈…開幕 declare…open; declare the commencement of …
宣佈…閉幕 declare the closing/conclusion of …
陛下 Your/His/Her Majesty
殿下 Your/His/Her (Royal/Imperial/Serene)Highness
閣下 Your/His/Her Honor/Excellency
貴賓們 distinguished guests
尊敬的主席先生respectable/honorable/respected Mr. President
至此… 之際 on the occasion of
代表… on behalf of …
我願藉此機會… I would like to take this opportunity to …/ I would like to avail myself of this great opportunity to …
我代表中國政府向各位來賓表示熱烈歡迎，對會議的召開表示衷心祝賀!
On behalf of the Chinese government, I would like to extend our sincere welcome to all the guests here and to express our warm congratulations on the convening of this session.
最後，祝各位在北京生活愉快，並祝會議圓滿成功!
Finally, I wish a full success of the conference and wish you all a pleasant stay here in Beijing
