This book lay unread in the author's notebook for around 60 years.
本书有60多年的时间都尘封在作者的笔记之中。
However, tracking read and unread documents has an impact on application performance.
然而，跟踪已读和未读文档会对应用程序的性能产生影响。
However, tracking read and unread documents has an impact on application performance.
然而，跟踪已读和未读文档会对应用程序的性能产生影响。
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