天册(275年-276年六月)是三国时期吴末帝孙皓的第六个年号，共计2年。
所有这些举措都是为了保障营销活动的成效，有人相信《消失的符号》的销量将会接近罗琳最新一本《哈利·波特》——该书在开售头八天售出了350万册。
It was all to safeguard a marketing campaign which some believe could come close to achieving sales on a par with Rowling's last Harry Potter book, which sold 3.5m copies in its first eight days.
虽然Google Books已经扫描的图书数量至今还对外保密，但是Google声称大约一天要扫描3000册。
The total number of books scanned so far is a closely held secret, but Google has claimed to be scanning 3000 items every day.
哈利波特系列的新书，只算英文版，在上架一天之内就售出了九百万册。
The latest Harry Potter book sold 9 million copies in its first 24 hours – in English.
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