At this juncture, I would like to make an important announcement.
此时此刻我要宣布一项重要的`事情。
And finally, I would like to thank you all for coming here today.
最后，我感谢大家今天的光临。
I would like to express my gratitude to everyone for their hard work.
我要对所有辛勤劳动的人表示感谢。
Lastly, I would like to thank my parents for all their support.
最后，我想感谢父母对我的全力支持。
On a more personal level, I would like to thank Jean for all the help she has given me.
从较为个人的角度我愿感谢琼给予我的一切帮助。