In return for a cozy, safe place to live, the algae provide the building blocks polps need to survive and make limestone to build the reef structures.
进而为了使珊瑚虫有一个舒适和安全的住所，海藻为珊瑚虫提供了能够存活的建筑模块，从而造成了石灰岩来构建成礁结构。
In return for a cozy, safe place to live, the algae provide the building blocks polps need to survive and make limestone to build the reef structures.
进而为了使珊瑚虫有一个舒适和安全的住所，海藻为珊瑚虫提供了能够存活的建筑模块，从而造成了石灰岩来构建成礁结构。
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