翻译珊瑚礁

来源:百度知道 编辑:UC知道 时间:2024/06/08 01:51:42
帮我把这个翻译成英文。尽量简单、容易懂

在热带海洋中,触目皆是一块块巨大的珊瑚礁石或珊瑚构成的岛屿。这些礁石和岛屿往往被人们误认为是岩石所成,实际上它们是由从古至今的珊瑚虫建造的。珊瑚虫是一种海洋腔肠动物,身体呈圆筒形,辐射对称,上端有口,口周围有几条触手,下端有基盘,起固定作用,体壁有内外胚层够呈。外胚层能分泌石灰质或角质的骨骼,这就是通常所说的珊瑚。

珊瑚虫生长和繁殖都很快,群体不断出芽。当珊瑚虫死亡后,它们的子孙即在起祖先的“遗骨”上一代一代地繁殖下去,年深日久,日积月累,珊瑚虫群体逐渐在海岛四周或海边堆积,形成一块块说大的礁石或一座座岛屿。世界上最大的珊瑚岛是澳大利亚东北部部名的大保礁,它宽约56千米,长达2040千米,是澳大利亚大陆的天然屏障。此外,太平洋的马绍尔群岛,中国南海的西沙群岛、南沙群岛都是由造珊瑚礁的骨骼堆积形成的岛屿。凡是能造礁的珊瑚,称为造礁珊瑚;不能造礁的珊瑚称为非礁珊瑚。在珊瑚礁的周围,由许多藻类和海洋动物,它们够成珊瑚礁生物群落。这些藻类在珊瑚虫制造骨骼时,会排放二氧化碳来制造养分,同时释放出大量的氧,而珊瑚虫会吸收这些氧。所以珊瑚礁就像热带雨林一般,能制造生物生存所所需要的氧,被称为“海洋的热带雨林”。

珊瑚对人类有许多益处。珊瑚岛可供人类居住;其礁石烧成石灰,可用于建筑。古珊瑚礁和现代珊瑚礁可以形成储油层,对开采石油有重要意义。目前已发现和开采的礁型大油田即有十多个,可采储量达50亿吨。软珊瑚、柳珊瑚等是非常好的药材。珊瑚有黄、白、红和蓝色,其形状千姿百态,是天然装饰品等。但由珊瑚礁形成的暗礁,也常会给航行中的舰船带来沉船之灾。

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 reproduction are very quick, the community buds unceasingly. After coral polyp death, their descendants namely in have the ancestor “the remains” on to reproduce from generation to generation, for a long time, accumulates over a long period of time, the coral polyp community gradually in the isl