Your Honor Mr. Mayor :Your Honon 同Your Excellency一样，用以尊称高级官员，“阁下”的意思

欢迎/开幕/闭幕词   welcome /opening/closing speech/adress

致开/闭幕词deliver/make an opening/closing speech

签字仪式signing ceremony

友好访问goodwill visit

宣布开幕 declare ...open ;declarethe commencement of...

宣布闭幕declare...the conclusion /closing of...

发表热情友好讲话make a warm and friendly speech

热情洋溢的欢迎词gracious speech of welcome

尊敬的市长先生Respected /respectable/honorable Mr.Mayor

陛下Your /His / Her Majesty

殿下Your/His /Her Highness/Excellency /Royal Highness

阁下YOUr/His /Her Hornor/Excellency

夫人Madam

东道国host country

值此.......之际on the occasion of

以........的名义in the name of

由衷的谢意Heartfelt thanks