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新概念优美背诵短文50篇 Unit14:A Rare Fossil Record

14 A Rare Fossil Record The preservation of embryos and juveniles is a rate occurrence in the fossil record. The tiny, delicate skeletons are usually scattered by scavengers or destroyed by weathering before they can be fossilized. Ichthyosaurs had

发表于:2018-11-27 / 阅读(1260) / 评论(0) 分类 新概念优美背诵短文50篇

考研背诵50篇——14 A Rare Fossil Record

The preservation of embryos and juveniles is a rate occurrence in the fossil record. The tiny, delicate skeletons are usually scattered by scavengers or destroyed by weathering before they can be fossilized. Ichthyosaurs had a higher chance of being

发表于:2018-12-04 / 阅读(109) / 评论(0) 分类 考研背诵50篇
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