练习

【练习】

The hunter-gatherer tribes that today live as our prehistoric human __1

ancestors consume primarily a vegetable diet supplementing with animal foods __2

An analysis of 58 societies of modern hunter-gatherers, including the Kung of southern Africa, revealed that one-half emphasize gathering plants foods,

one-third concentrate on fishing, and only one-sixth are primarily hunters,Overall, two-thirds and more of the hunter-gatherer’s calories come from __3

plants. Detailed studies of the Kung by the food scientists at the University of London, showed that gathering is a more productive source of food than is hunting. An hour of hunting yields in average about 100 edible __4

calories, as an hour of gathering produces 240. __5

Plant foods provide for 60 percent to 80 percent of the Kung diet, and no __6

one goes hungry when the hunt fails. Interestingly, if they escape fatal infections or accidents, these contemporary aborigines live to old ages despite of the absence __7

of medical care. They experience no obesity, no middle-aged spread, little dental decay, no high blood pressure, no heart disease, and their blood cholesterol levels are very low (about half of the average American adult). __8

If no one is suggesting that we return to an aboriginal life style, we certainly __9

could use their eating habits as a model for healthier diet. __10

答案及讲解

【答案及讲解】

1 将 as 改为 like

此处的意思是“像史前人类祖先那样生活”。

2 将 supplementing 改为 supplemented

supplemented 修饰diet，可以看作which is supplemented with animal foods的简化形式。

3 将 and 改为or

4 将 in 改为 on

on average 是固定用法。

5 将 as 改为 while 或者 whereas

6 删掉for，或者将 provide 改为 account

此处provide 是及物动词，后面不用介词for

7 删掉第一个of

despite 做介词，后面直接接名词。

8 在 half 后加 that

that 指代前面的blood cholesterol levels，不能省略，因为这里是将部落成员的胆固醇含量与美国人的胆固醇含量相比较。

9 将 if 改为 whereas 或者 while

此处意思为“尽管没有人……,但是……”，是转折关系。

10 在 for 后面加不定冠词 a