但是会员需要填写他信任的朋友或家人的信息才能登陆，如果出了什么事，就会启动通知程序。
Instead, members have to give trusted friends or family the information needed to log in to the site and start the notification process if something should happen.
图书馆的会员只需要在网页上登陆，不管在图书馆还是在家，输入他们的图书馆会员号码就可以把图书下载到电脑中。
It works by members of libraries logging onto a website, either at the library or at home, typing in their library membership number and downloading the books to their computer.
网站会员把书放在公园椅子上，公车上，火车站和咖啡店。无论谁找到他们的书会登陆这个网站，记录他们在哪里找到的。
Members leave books on park benches and buses, in train stations and coffee shops. Whoever finds their book will go to the site and record where they found it.
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