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[ti:UNIT 2 DNA Lesson 12 Did You Ever See a Chorse?] [0:01.725]UNIT 2 第二单元 [0:03.405]DNA [0:05.587]Lesson 12: 第12课： [0:06.938]Did You Ever See a Chorse? 你见过Chorse吗？ [0:10.298]You need two groups to sing this song. 需要两组人...