那你要做什么，当你长大的时候？
当你长大的时候你想要干什么？我想要成为一名工程师当我长大的时候。
What do you want to be when you grow up? I want to be an engineer when I grow up.
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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