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字号:
1. extinction n.熄灭，消灭
2. dinosaur n.恐龙
3. puny a.弱小的，发育不良的
4. mammal n.哺乳动物
5. culprit n.罪犯；引起不良后果的事物(原因)
6. reptile n.爬行动物
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60秒科学:雨林没了,爬虫多了
时间:2010-12-02 10:04:53 来源:scientificamerica 编辑:sunny 每天三分钟英语轻松学
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