Firstly, on behalf of xxx, please allow me to congratulate to all for you for the opening of this international conference, to welcome all our friends, scholars and experts who came a long distance from abroad, and to thank all the leaders for attending this meeting.
领导 要看是什么, 一般外国人不用leader, 而用领导的具体职位, 或者说政府领导 government officials,或者说公司领导 executive officers of the company... 领导是一个很中国的词..
First please allow me, on behalf of the international conference on XXX at our warm congratulations! To express our countries experts and scholars, our warmest welcome! To visit our meeting leaders heartfelt thanks!
First, please allow me to show behalf of xxx of the international conference held this warm congratulations! To national experts and scholars from afar, the warmest welcome! to come to our meetings to express my sincere thanks to all the leaders!