这是我第一次参加长城的翻译：This is my first time to participate in the great wall 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

This is my first Great Wall

This is my first time to participate in the great wall

This is I first time joins the Great Wall

This is the first time I have participated in Great Wall

This is my first time to participate in the great wall