7) In terms of numbers of species, 20 per cent of mammals are bats
(7)就物种种类的数量来说,蝙蝠的种类占哺乳动物种类总数的20%
There are around 1,240 classified bat species, compared to around 5,400 mammal species.
现有记载的蝙蝠种类就有1240种,而哺乳动物的种类是5400种。
The mammals group is relatively small in itself, as there are around 1.2 million species of animals, 950,000 of which are insects.
哺乳动物本身就是一个种类数量相对比较小的群体,世界上大约有120万种动物,其中昆虫类动物就有95万种。
8) Six per cent of all humans that have ever lived, are alive now
(8)在地球上存在过的人类中6%的人都还活着
Depending upon population projections at different points in history, slightly over 100 billion homo sapiens are predicted to have been born, ever.
根据历史上不同时期的人口调查结果显示,全世界出生人口估计共约有1000亿。
The current population of the earth is around 7.3 billion, meaning that today's cohort is roughly seven per cent of all people to tread on Terra.
目前地球上约有73亿人口,也就是说目前的人口约占到在地球上存在过人口总数的7%。
9) Most silent films are lost
大部分的无声电影已经流失了
Martin Scorsese's Film Foundation has estimated that 90 per cent of American films made before 1929, are gone forever.
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