【探索世界】欧洲自然(16/28)
作者:互联网
2012-12-19 10:00
Hints: Europe Southern England plankton 今天的很短,小练习一下吧~
The next great event that Europe experienced took place 100 million years ago. The clues lie hidden in the famous chalk cliffs of Southern England. Chalk is composed of the shells and skeletons of ancient marine plankton, microscopic creatures, trillions and trillions of them.
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