单词：fossil pollen
fossil pollen的用法和样例：
例句
- A study of pollen lifted from holes drilled at the bottom of African lakes shows that the African landscape has been in a state of flux for the past several million years.学者研究从非洲一些湖底的钻孔里得到的花粉化石，发现非洲地貌在过去几百万年中一直处于流变的状态。
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