Dear teachers and fellow students:
Good afternoon!
It's my great honor to stand here and deliver you a speech.
As for me,I would like to choose science as my major subject.I have been admired the secret of nature since i was very young.(选择理科的好处）
（当然,选择文科也有一定好处,例如：）
Hope my speech will help u make a satisifying choice.
Thats all and thank u for listening. Dear teachers and fellow students:
Good afternoon!
It's my great honor to stand here and deliver you a speech.
As for me,I would like to choose science as my major subject.I have been admired the secret of nature since i was very young.(选择理科的好处）
（当然,选择文科也有一定好处,例如：）
Hope my speech will help u make a satisifying choice.
Thats all and thank u for listening.