Author: zekro

World Earth Day

Topic of Happy Home Club, April 22, 2009: Speech on Science Popularization Activity on the 40th World Earth Day  在第40个世界地球日广场科普活动上的演讲 Ladies and Gentlemen, Citizens of Suzhou, Good afternoon! 女士们、先生们,苏州的市民朋友们,下午好! Today is the...

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