Question

下面这段英语四级真题考试要点是什么？

Because a patent remains permanently public after it has terminated, the shelves of the library attached to the patent office contain details of literally millions of ideas that are free for anyone to use and, if older than half a century, sometimes even re-patent.

Answer 1

Becausea patent remains permanently public after it has terminated, the shelves of thelibrary attached to the patent office contain details of literally millions ofideas that are free for anyone to use and, if older than half a century,sometimes even re-patent.

原因状语从句：Because a patent remains permanently public

时间状语从句：after it has terminated

主语：the shelves of the library

定语：attached to the patent office

谓语：contain

宾语：details of literally millions of ideas

定语从句：that are free for anyone to use and, if older than half acentury, sometimes even re-patent.

由于一项专利在其有效期终止后将被永远公开，因此附属于专利局的图书馆的书架上收藏有至少上百万种发明想法供任何人免费使用，如果它们已经存在半个多实际，有时候甚至被人们用于重新申请专利。