求翻译：当我在高中的时候，曾经参加过学校的演讲比赛，在比赛之前我花了很多的时间准备和练习，但是当我真正站在演讲台时却因为紧张而忘记了演讲内容是什么意思？

When I was in high school, have attended the school's speech contest, before the race I spent a lot of time to prepare and practice, but when I really standing podium Shique because he was nervous and forget the speech content

When I was in high school, who had participated in the School Speech Contest before the match, I have spent a lot of time to prepare and practice, but when I truly stand in lecture platform when tension but because it has forgotten that lecture contents

When I in high school's time, has attended the school oratorical contest, before competition I have spent the very much time preparation and the practice, but when my genuine station when tribune because of anxious has actually forgotten the lecture content

When I was in high school, who have participated in school speech contest, I spent a lot of time to prepare before the game and practice, but when I stand on the stage because of nervous and forget presentation

When I am in high school, having ever participated in the speaking competition of the school, I spent much time preparation and practised before having a match, but forgot the speech content because of being nervous when I really stood in the speech platform