新闻是有分量的

新罗区甘娱乐城(2)

2019-05-01 10:34栏目:新闻

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南极洲是一个极端的大陆

南极大陆是一个极端的地方,尽管它只是第五大大陆,但其南极冰盖包含了地球上70%的淡水和90%的冰。或许你不知道,大家往往认为南极洲是沙漠,其内陆地区每年的降水量只有2英寸(50毫米)(当然,通常是雪)。

The southern continent is a place of extremes, with the Antarctic ice cap containing some 70 percent of Earth's fresh water and about 90 percent of its ice, even though it is only the fifth largest continent. Did you know Antarctica is actually considered a desert? Inner regions get just 2 inches (50 millimeters) of precipitation a year (typically as snow, of course).

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珊瑚礁是最庞大的生物结构

珊瑚礁是地球上物种生存密度最高的生态系统,可以与雨林相媲美。美国国家海洋和大气管理局表示,虽然珊瑚礁是由微小的珊瑚虫组成,但它们是地球上最庞大的生物结构——一个由相互联系的有机体组成的群落——有些甚至可以从太空中看到。

Coral reefs support the most species per unit area of any of the planet's ecosystems, rivaling rain forests. And while they are made up of tiny coral polyps, together coral reefs are the largest living structures on Earth — a community of connected organisms — with some visible even from space, according to NOAA.

编辑:高启辉 侯俊杰

实习生:白洁

资料来源:美国生命科学网(www.livescience.com)、今日宇宙新发现新闻网(www.universetoday.com)

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