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题库 / Prep2007E1-SC-66
Africa's black rhino population in the mid-1970's numbered about 20,000, ten times the estimated population of 2,000 in 1997.
the estimated population
that of their estimated population
more than the population's estimated amount
more black rhinos than their population estimate
more than that of their population's estimated amount
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1、Ron：
* \"Amount\" is incorrect. Because rhinos can be counted, it needs to be \"number\" instead.
* \"Population\" already represents the number of rhinos. So, if \"population\" is there, the use of \"number\" or \"amount\" is redundant.
(B) that只能指代rhino population,从而跟后面的their estimated population意思重复
The population of A (is) 10 times the population of B
X is 10 times Y
X is 9 times more than Y
X和Y要同属性
AB区别：
先说CDE, 这里是整10 times，所以不需要和more than 搭配，如果用9 time 就要加more than
B的that of冗余，没有可以代指的对象
9 times more than
10 times＋名词
X is 10 times Y
X is 9 times more than Y
归因：忘记规则
amount指不可数名词；可数用quantity或number
其次C中amount和population意思重复，没必要
amount of接不可数名词，number of接可数名词
不说the amount of population或population's amount, 可以直接说population is 2000；number做动词表示总数达到，总计为
c,
* "Amount" is incorrect. Because rhinos can be counted, it needs to be "number" instead.
* "Population" already represents the number of rhinos. So, if "population" is there, the use of "number" or "amount" is redundant.
省了more than
C\D\E改变了句意，增加了数量，不符合题意，先行剔除
如果用more than结构的话，应该是 nine times more than that of 2000 in 1997.
population numbers 20000 in 1970，ten times the population of 2000 in 1997，ok
如果加入more than，population numbers 20000 in 1970，ten/nine times more than the population of 2000 in 1997，比较对象就是population对population，加了that of，比较population's amount的都是错的。
D，estimate是动词，被动式/形容词是estimated，名词是estimation，than their population estimate of 2,000，结构错误
用more than是nine time more than
ten times 后面可直接加名词
A，the+名词指代前面出现过的名词
但这里the estimated population of 2,000 in 1997，无论是estimated还是2000还是In 1997都在做定语修饰population，已经将population定住了，所以它不会再指代population in 1970
nine times more than
这里不需要that of 做进一步的修饰
用more than 的话是nine times more than ...
(B) that只能指代rhino population,从而跟后面的their estimated population意思重复
(C) the population’s estimated amount表达笨拙,复杂
(D) 表达复杂,笨拙；their没有指代对象。
(E) 表达复杂,笨拙,that指代rhino population和their population’s estimated amount意思重复；their没有指代对象
从句子意思考虑，原文给出了具体数字，我们可以看出CDE都有问题，是9 times more 而非10 times more
表示倍数是可以直接用倍数（数字+times）的，就像double后面是可以直接加名词的。