英语听力：自然百科 大堡礁：自然奇迹—3

（单词翻译）

 They respond to touch, temperature, currents, and the cycles of the sun and the moon. And their tiny movements combined to give each colony a rhythm of its own.The polyps can't build the reef alone. For this, they need parterners that are even smaller. Within each polyp's tentacles¹ are millions of tiny brown dots. Each is a microscopic² plant, which transform sunlight into food and energy for the corals. It's a miraculous³ parternship that allows the corals to turn the minerals in the water into limestone⁴, building their stony⁵ skeletons. In this way, each colony grows. If we were able to watch a reef over several years, we'd see a continuely growing marine⁶ metropolis⁷. Its intricate architecture provides homes for thousands of creatures.