这几乎是世界人口的五分之一。
它的面积约180万平方公里，约占全国总面积的五分之一。
It covers an area of about 1.8 million square kilometers, about one fifth of the national total.
世界上近五分之一的电力是由利用落水动力旋转的水轮机产生的。
Nearly one fifth of all the electricity generated worldwide is produced by turbines spun by the power of falling water.
研究表明，当人们按实际使用量付款时，他们使用的能源大约减少了五分之一。
Studies show that people use approximately one fifth less energy when they are billed for exactly what they use.
他给了她总数的五分之一。
印度在国防上支出预算的五分之一以上。
二十美分是一美元的五分之一。
至少有3000种鱼类生活在那里，世界上五分之一的鸟类也生活在那里。
At least 3,000 kinds, of fish, live there, and one-fifth of all the bird species in the world.
你知道地球上有五分之一的人说中文吗？
世界上五分之一的淡水也存在于亚马逊雨林中。
One fifth of the world's fresh water is also found in the Amazon Rainforest.
五分之一的美国人将使用平板电脑或智能手机。
对于美国约五分之一的贫困儿童来说，玩耍的减少是很严重的危害。
The decline of play is a special hazard for the roughly 1 in 5 children in the United States who live in poverty.
官方数据显示目前近五分之一的20多岁的大学毕业生与父母同住。
Official figures show that almost one in five graduates in their late 20s now live with their parents.
苏珊娜·福克斯说，五分之一的互联网用户上网寻找有同样症状的人。
Susannah Fox says one in five Internet users have gone online to find other people who have the same condition.
超过一半的居民用电用于运行家用电器，并产生了全球五分之一的碳排放。
More than half of all residential power goes into running household appliances, producing a fifth of the world's carbon emissions.
董事会喜欢这个主意，但表示只能出2.5万美元，而这是成本开销的五分之一。
The board liked the idea but said it could offer just $ 25,000, one-fifth of the cost.
自1951年以来，在职的已婚女性的比例已经从刚超过五分之一增长到二分之一。
Since 1951 the proportion of married women who work has grown from just over a fifth to a half.
学校的校长告诉我们，“我校五分之一的学生都能升学就读牛津大学和剑桥大学。”
The headmaster of the school, told us, "The fifth of pupils here go on to study at Oxford and Cambridge."
长江流经多种不同的生态系统，是诸多濒危物种的栖息地，灌溉了中国五分之一的土地。
As a habitat for many endangered species, the Yangtze River flows through diverse ecosystems and irrigates one-fifth of China's land.
长江流经多种不同的生态系统，是诸多濒危物种的栖息地，灌溉了中国五分之一的土地。
As a habitat for many endangered species, the Yangtze River flows through diverse ecosystems and irrigates one-fifth of China's land.
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