你好,我是英语师范学校毕业的,希望可以帮助到你!
这句话的翻译有很多种,这里我就用比较自然的方式翻译出来吧~
You are just a human being when it comes to the whole world,however,you may mean the whole world when it mentions to someone.
当然,你也可以翻译为：
You are simply/merely a/an man/individual to the entire universe/globe/world/planet,nevertheless,you may mean a whole world to somebody.