亚马孙河

There are only 4 types of freshwater dolphin: the boto or Amazon river dolphins in the Amazon region, the Ganges River dolphin and Indus River dolphins in India, and the Baiji in the Yangtze River in China.

淡水豚世界上仅有4种，即南美洲亚马孙河的亚河豚，印度次大陆的恒河豚和印河豚，再就是中国长江的白暨豚。

A land of heavy forests (311 million hectares) and barren deserts, of high-peaked mountains (McKinley rises to 6,300 meters) and deep canyons, America also enjoys bountiful rivers and lakes.

为很多民歌和传说所传颂的宽阔的密西西比河水系，从加拿大蜿蜒曲折6400公里，流入墨西哥湾，是除尼罗河、亚马孙河以外的世界第三大河。

The Federation is formed by the union of the Federal District, the 26 States, and the 5,564 Municipalities.

其中，亚马孙平原是世界上最大的平原，亚马孙河是世界上最大的河流。

The rock art in the Amazon Basin may be as old as human occupation itself.

亚马孙河流域的岩石艺术可能和人类在此居住的历史一样悠久。

Two years ago a study of another amazonian tribe , the piraha , reported that the ability of tribal adults to conceptualise numbers is no better than that of infants or even some animals

法国和美国的研究人员在最新一期的科学杂志上发表文章称，在亚马孙河丛林深处有一个部落群，即便他们没有用来表达几何学概念的语言也极具几何学天赋。

Two years ago a study of another amazonian tribe , the piraha , reported that the ability of tribal adults to conceptualise numbers is no better than that of infants or even some animals . the research suggested that without words for specific numbers , a number sense cannot develop

法国和美国的研究人员在最新一期的科学杂志上发表文章称，在亚马孙河丛林深处有一个部落群，即便他们没有用来表达几何学概念的语言也极具几何学天赋。

E.O. Wilson, a biologist at Harvard, called the depletion of rain forest areas " the greatest extinction since the end of the age of dinosaurs."

除了亚马孙河流域的热带雨林，其他地区的许多热带森林也正在受到不断的砍伐。

But instead of being called travelers, they are known as tourists and they are seen all over the world floating down the Amazon , cruising to Alas-ka, flying from Timbuktu to Easter Island, and taking pictures of Norwegian churches and Pakistani costumes.

但是人们不把他们称为旅行者，而是称为游客，世界各地都有他们的踪迹：有的沿亚马孙河顺流而下，有的乘船到阿拉斯加去，有的从了伯克都飞往伊斯特岛，还有的去拍摄挪威的教堂和巴基斯坦人的服饰。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。