...nergy is the source of endless innovation, enrich and improve our lives 天气一天一天的变冷 » The days of weather cooled 森林曾经覆盖地球的五分之四的面积 » Area of four-fifths forest once covered the Earth ..
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斜率 » graph 天气一天一天的变冷 » Weather day cooling 英语老师又高又苗条，她既友好又乐于助人，经常帮我们英语，把我们照料得很好 » English teacher is tall and slender, she was ...
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