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Coral reefs

Coral reefs are structures formed from the calcium carbonate secretions of corals. They are colonies of tiny animals in marine areas containing few nutrients.

Contributors in Coral reefs

Coral reefs

流行

Natural environment; Coral reefs

在給定的時間內人口內疾病個案數目。

放射性

Natural environment; Coral reefs

元素的原子核自發衰變。它涉及原子核中的質子數的變化,因此將創建一個新元素的原子。

劣質

Natural environment; Coral reefs

解剖之下,更低,或底部 (例如,嘴裡是僅次於鼻子)。

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