The equilibrium of every ocean depends on these corals. 每个大洋的生态平衡都取决于这些珊瑚
Thus, corals are born from the marriage of algae and shells. 例如 珊瑚产生于藻类与贝壳的结合
The corals are protected by mangroves. 珊瑚受到红树林的保护
Whip corals stretch out into the current. 海鞭在海流中伸出手来
Corals thrive in these waters with the help of microscopic plants, algae that grow within the tissues of the polyps 珊瑚在一种微生植物的帮助下生长-海藻 是居住在珊瑚虫里的一种共生藻
Limestone is composed of minerals derived from marine shells and corals, 石灰岩由海螺和 珊瑚中的矿物沉积后形成