Unit2 THE RETURN OF THE DINOSAURS? 恐龙的回归？The possibility of cloning fierce and extinct wild animals has always excited film makers. 克隆凶猛和灭绝的野生动物的可能性一直使电影制片商感到兴奋。And they are not the only ones! 然而他们并不是唯一对此感到兴奋的人。The popularity of films such as Jurassic Park, in which a scientist clones several kinds of extinct dinosaurs, proves how the idea struck a mixture of fear and excitement into peoples hearts. 在侏罗纪公园这部影片中，有一位科学家克隆了好几种不同的绝种恐龙。类似这样的电影很受欢迎，证明了这一想法使人们感到既兴奋又恐惧。But in fact we
