周期表的元素

http://translate.googleusercontent.com/translate_c?hl=zh-CN&langpair=en%7Czh-CN&u=http://environmentalchemistry.com/yogi/periodic/H.html&rurl=translate.google.com.hk&usg=ALkJrhhmFwahgsHDJ8hkQAGUOeJvizlPGg

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