Each year, fishermen catch millions of sharks, cut off their fins, and dump the bodies into the ocean to die. The fins are used to make shark fin soup, an Asian delicacy sold in many countries. Recently, a team of scientists and environmental groups collected soup from restaurants across the United States and analyzed the soups' genetic make-up. They found endangered species on the menu.

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格式：MP3学科分类：语言学

来源：口语伙伴· 查看内容>>