VOA慢速英语2013.09.07
[audio]http://sound.yywz123.com/tingbbs/voa/voa20130907.mp3[/audio]Scientists who work at the museum come outside to describe plants and insects in the natural setting of this outdoor laboratory.在博物馆工作的科学家来到户外,讲解这个户外实验室天然环境中的植物和昆虫.
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