At this juncture, I would like to make an important announcement.

　　此時此刻我要宣布一項重要的`事情。

　　And finally, I would like to thank you all for coming here today.

　　最后，我感謝大家今天的光臨。

　　I would like to express my gratitude to everyone for their hard work.

　　我要對所有辛勤勞動的人表示感謝。

　　Lastly, I would like to thank my parents for all their support.

　　最后，我想感謝父母對我的全力支持。

　　On a more personal level, I would like to thank Jean for all the help she has given me.

　　從較為個人的角度我愿感謝瓊給予我的一切幫助。