翻译珊瑚礁

发布网友发布时间：2022-04-22 07:35

共1个回答

热心网友时间：2022-06-17 20:20

In the tropics sea, strikes the eye is a giant coral reef or the coral constitution islands. These reefs and the islands often are taken for by the people are the rock become, in fact they are construct by coral polyp from ancient times till now. The coral polyp is one kind of sea coelenterate, the body assumes the circle tubular, the actinomorphy, the upper extreme has the mouth, the mouth surroundings has several tentacles, the lower extremity has the basal disc, plays the clamping action, the body wall has the inside and outside embryonic layers to suffice to assume. The ectoderm can secrete calcareous or the cutin skeleton, this is the usually called coral. The coral polyp growth and the reproction are very quick, the community buds unceasingly. After coral polyp death, their descendants namely in have the ancestor “the remains” on to reproce from generation to generation, for a long time, accumulates over a long period of time, the coral polyp community graally in the island all around either the seashore stack, formed one to say the big reef or islands. In the world the biggest coral island is northeast Australia famous guarantees the reef greatly, it extends the approximately 56 kilometers, is 2040 kilometers, is the Australian mainland natural blockade. In addition, Pacific Ocean's Marshall islands, the Chinese South China Sea's Xisha Islands, the Nansha Islands are by make the islands which the coral reef the skeleton stack forms. Every can make the reef the coral, is called the reef-building coral; Cannot make the reef the coral to be called the non-reef coral. In coral reef periphery, by many algae and the marine animal, they suffices the coral reef biotic community. These algae when coral polyp manufacture skeleton, will discharge the carbon dioxide to make the nutrient, simultaneously will release the massive oxygen, but the coral polyp will absorb these oxygen. Therefore the coral reef looks like the tropical rain forest to be ordinary, can make the oxygen which the biological survival needs, is called “the sea tropical rain forest”. The coral has many profits to the humanity. The coral island may supply the humanity to live; Its reef calcination, may use in constructing. The palaeophyllum reef and the modern coral reef may form the oil-bearing reservoir, to mines the petroleum to have the important meaning. At present has discovered and the mining reef big oil field namely has more than ten, the recoverable resources amounts to 5,000,000,000 tons. The soft coral, the gorgonia and so on are the very good raw materials for medicine. The coral has yellow, white, red and the blue color, its shape is differ in thousands of ways, is the natural ornament and so on. But hidden rock which forms by the coral reef, also Chang Hui brings disaster of the sunken wreck for navigation in ships.