原来你已经离开很久了，久的我的输入法都不认识你了。
So you have been away for a long time, long my input method do not know you.
当你长大，能够读这封信的时候，我应该已经离开你很久了。
By the time you're old enough to read this, I will have been gone a long time.
当你长大，能够读这封信的时候，我应该已经离开你很久了。
By the time you're old enough to read this, I will have been gone a long time.
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