Insects as a food source

文章大意

这篇雅思听力Part4讲座探讨将昆虫作为新型食物来源的可能性。讲座指出昆虫富含蛋白质和维生素，养殖成本低、占地小，排泄物酸性低对土壤河流损害小，还可加入动物饲料充当天然抗生素。同时讨论了从野外采集昆虫可能导致物种濒危，以及昆虫来源不明等潜在问题。

题目与答案

1. Why insects should be considered as a food source

   · They have a lot of protein and contain 31_____ .

   答案：vitamins

   原文定位：Well, for a start, a number of them are full of protein, and many also have certain vitamins, which may surprise you, more so than a typical farm animal, in fact

   同义替换：「lot of」↔「many」

2. · Their waste products don`t harm the soil or the 32_____ on farmland.

   答案：rivers

   原文定位：the waste products of insects are far less acidic and would therefore do very little damage to the soil or to any of the rivers that run through farmland

   同义替换：「harm」↔「damage」

3. · Their production requires less expense and little 33_____ compared to other animals.

   答案：space

   原文定位：No trees need be chopped down or forest turned to pasture, so the space that they would occupy would be radically smaller than for, say, cows or sheep

   同义替换：「less」↔「would be very low」，「little」↔「radically smaller」，「compared to」↔「than」

4. · Some can be added to a animal feed as a kind of 34_____ .

   答案：antibiotic

   原文定位：if they were part of the animal feed, would act as a sort of natural antibiotic within a cow or sheep's digestive system

   同义替换：「can be added to」↔「part of」，「kind」↔「sort」

5. Sourcing insects as a food supply: the wild versus farming

   If insects are taken from the wild:

   ·it could lead to the loss of a species

   ·people may be harmed by the 35_____ they contain.

   答案：bacteria

   原文定位：Imagine the scenario if food producers or retailers were supplied with insects that were carrying bacteria

   同义替换：「contain」↔「carrying」

6. When insects are bred on insect farms:

   ·this can supply the growing demand in the 36_____ of some countries

   答案：cities

   原文定位：And it's not in rural areas where you'd expect, but in fact, in the cities

7. ·the 37_____ of the insects may be affected.

   答案：taste

   原文定位：they'll tell you that when insects are intensively farmed, their taste is simply not the same

8. The challenges facing insect farmers

   ·Different kinds of insect require a different temperature to breed.

   ·Farmers and researchers are unclear how to deal with 38_____

   答案：disease

   原文定位：And so far, researchers and farmers have not come up with any clear or long-term effective solution to it. We're talking about the problem of disease

   同义替换：「how to deal with」↔「have not come up with any clear or long-term effective solution to it」

9. ·Better tanks need to be developed so 39_____ is faster.

   答案：cleaning

   原文定位：then the tanks used to house them have to be better designed. And this has to happen so that cleaning takes up less time

   同义替换：「need to be developed」↔「have to be better designed」，「faster」↔「takes up less time」

10. ·Farmers need to develop a strategy for 40_____ the insects.

    答案：marketing

    原文定位：And I'm not talking about production, but marketing, something that'll persuade potential customers to try something different