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php: /usr/local/lib/libcurl.so.4: no version information available (required by php)
出现原因是安装了多个版本的库，ubuntu的一些库似乎增加了一些附加补丁，导出的符号与ubuntu有关联的版本信息，但在标准的库中是没
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use multiple simple queries or a join
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how to improve the rank of search results in google
There are many factors that affect a website’s ranking in Goo