 如何寻找element,其内容包含某些字符?
what is the Xpath that will gather the following infomation? The description for each item in which the description contains the word “and”. <?xml version="1.0" encoding="iso-8859-1"?>
<rss version='2.0'>
<channel>
<title>Yahoo! News: Science News</title>
<copyright>Copyright (c) 2005 Yahoo! Inc. All rights reserved.</copyright>
<link>http://news.yahoo.com/i/753</link>
<description>Science News</description>
<language>en-us</language>
<lastBuildDate>Mon, 25 Jul 2005 21:50:59 GMT</lastBuildDate>
<ttl>5</ttl>
<image>
<title>Yahoo! News</title>
<width>142</width>
<height>18</height>
<link>http://news.yahoo.com/</link>
<url>http://us.i1.yimg.com/us.yimg.com/i/us/nws/th/main_142b.gif</url>
</image>
<item>
<title>NASA May Bend Rules to Launch Discovery (AP)</title>
<link>http://us.rd.yahoo.com/dailynews/rss/science/*http://news.yahoo.com/news?tmpl=story&u=/ap/20050725/ap_on_sc/space_shuttle</link>
<guid isPermaLink='false'>ap/20050725/space_shuttle</guid>
<pubDate>Mon, 25 Jul 2005 21:50:59 GMT</pubDate>
<description>AP - With the countdown entering its final hours and a fuel gauge problem still unexplained, NASA said it is prepared to bend its long-standing safety rules to launch the shuttle Tuesday on the first flight since Columbia's doomed mission 2 1/2 years ago.</description>
</item>
<item>
<title>NASA Urged to Keep Microbes From Mars (AP)</title>
<link>http://us.rd.yahoo.com/dailynews/rss/science/*http://news.yahoo.com/news?tmpl=story&u=/ap/20050725/ap_on_sc/microbes_to_mars</link>
<guid isPermaLink='false'>ap/20050725/microbes_to_mars</guid>
<pubDate>Mon, 25 Jul 2005 20:01:05 GMT</pubDate>
<description>AP - While Earth germs may not kill attacking Martians as they did in "War of the Worlds," a new study is calling on NASA to prevent contamination of Mars with microbes from our planet.</description>
</item>
<item>
...
...
...
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