(1)population n.
population的用法要注意以下四点:
①当问及国家、城市、地区等有多少人口时,可以用。
What is the population of China? 中国有多少人口?
②表达拥有多少人口时,我们常用have a population of.... 或some place with a population of. . . 。
China has a population of more than 1.3 billion people.
或China is a country with a population of more than 1.3 billion people. 中国有十三亿多人口
③当population置于句首充当句子的主语时,且其前有分数、百分数修饰时,谓语动词用复数。
About 80% of the Chinese population are Han people. 中国人口的80%是汉族
Two thirds of the population of this area are farmers. 这一地区三分之。的人口是农民
④修饰population这个词,常用big, large, small,而不用much, many等。
China has a large population.中国人口众多
(2) twice是名词,在这里表示倍数,倍数的表示法常有以下四种:
① A is... times + adj. /adv.的比较级+than B
This bridge is three times longer than that one. 这座桥比那座桥长三倍。
At least,the train runs five times faster than the boat. 火车的速度至少比小船快五倍
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