都市的光污染意味着，世界上五分之一的人们仅凭借裸眼将看不到银河。
Urban light pollution means that one-fifth of the world's population can no longer see the Milky Way with the naked eye.
小麦是世界上种植最广泛的作物，为全世界五分之一的人口提供口粮。
Wheat is the most widely planted crop in the world, providing a fifth of mankind's calories.
五分之一的人(占总数19%)不知道法语中表示“你好”的单词的意思，但这个单词是世界上最有名的外国问候语之一。
One fifth (19 per cent) did not know the meaning of the French word for hello, one of the most recognisable foreign greetings in the world.
在世界上中国有着最多的人口数量，世界上大约五分之一的人口生活在中国。
China has the largest population in the world, and about one fifth of the people in the world live in China.
南亚区域合作联盟成员国的领导人代表着世界五分之一以上的人口，也代表40%世界上最贫困的人。
The SAARC leaders represent more than one of every five people on the planet, but 40 percent of the world's poor.
南亚区域合作联盟成员国的领导人代表着世界五分之一以上的人口，也代表40%世界上最贫困的人。
The SAARC leaders represent more than one of every five people on the planet, but 40 percent of the world's poor.
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