For weeks, Facebook has been questioned about its role in spreading fake news.

几个星期以来，Facebook一直因其在假资讯传播过程中扮演的角色而遭到质疑。

Now the company has mounted its most concerted effort to combat the problem.

目前，该公司正采取步调最为一致的行动来解决这一问题。

Facebook said Thursday it had begun a series of experiments to limit misinformation on its site.

Facebook周四表示，公司已经着手推进一系列试验性举措，旨在遏制其网站上虚假信息的传播。

The tests include making it easier for its 1.8 billion members to report fake news, and creating partnerships with outside fact-checking organizations to help it indicate when articles are false.

这些试验包括：让其18亿名用户可以更加容易地举报假资讯，并与外部事实核查机构建立合作关系，以便及时就内容虚假的文章做出提示。

The company is also changing some advertising practices to stop purveyors of fake news from profiting from it.

此外，该公司正在改变某些广告业务惯例，为的是防止假资讯供应者从中获利。

Facebook is in a tricky position with these tests.

开展这些试验的Facebook处境颇为尴尬。

It has regarded itself as a neutral place where people can freely post, read and view content.

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