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            <title>描绘小灯泡的伏安特性曲线</title>
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            <title>太空生活</title>
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            <title>a粒子散射实验</title>
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            <title>受迫振动和共振</title>
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            <title>法拉第空心导体实验</title>
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            <itunes:duration>01:34</itunes:duration>
            <itunes:keywords>吸收光谱</itunes:keywords>
            <author>xyunk</author>
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            <pubDate>Fri, 27 Nov 2009 20:03:50 +0800</pubDate>
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