So we've seen a dramatic increase of signups for library cards about 50,000 signups during the period that we've been closed which is a significant number for us.

因此，我们看到图书证注册人数急剧增加--约5万人，在我们闭馆的这段时间里，这对我们来说是一个重要的数字。

When you click on the link, you will have to go through a couple of different pages and signups, but at the end you do get the book for free.

当你点击链接时，你将不得不浏览几个不同的页面和注册， 但最后你会免费得到这本书。