- How do you know that?
你怎么知道 - I read about it in a book...
我在书上看到的 - a very old book in Maester Aemon's library.
伊蒙学士的图书室里有一本非常古老的书 - What else did the book say?
书上还说了什么 - The white walkers
异鬼 - sleep beneath the ice for thousands of years.
在寒冰下沉睡千年 - And when they wake up...
而它们觉醒的时候 ...