You can not save it,because you are not around the world什么意思

You can not save it,because you are not around the world什么意思?
You can not save it,because you are not around the world 这句话什么意思?
可不可以把You can not save it中的can not 改成can't ?
are not 能缩写么?
你不能拯救它 因为你不是全世界
这句话应该怎么写呢?
刚才忘了问了