There's also been a great increase in the number of networking sites devoted to sharing advice on health issues but there are as yet no studies to prove the reliability of that advice.

致力于分享健康问题建议的社交网站的数量也在大幅增加，但目前还没有研究证实这些建议的可靠性。

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The case studies confirmed that many issues recur.

这些案例研究确定了很多重现的问题。

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“The U.S. has been smart, ” said Carlyle A. Thayer, a professor at the Australian Defense Force Academy who studies security issues in Asia.

“美国已经变聪明了，”在澳大利亚国防大学研究亚洲安全问题的教授卡莱尔·塞耶说。

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