联系是客观的，那么你知道在经济学中，产品和产品之间也是可以相互联系的吗?你知道这类话题中经常出现的词汇有哪些吗?本次前程百利小编就和大家来分享一下这则关于经济学的词汇，希望这则托福口语词汇可以帮助大家备考托福口语!
Listening Part:
Listen to part of a lecture in an economics class.
(female professor) So, when we talked about the demand for a product, we’re referring to how much consumers want to buy it, right? And often the demand for a product is influenced by its price; the more expensive it becomes the less chance people want to buy it.
OK, but that’s not the whole story. Sometimes the demand for a product can also be influenced by the price of other related products.
First, there are other products called “substitute goods”. If products can be substituted for one another then, um, well, then they are called substitute goods. They are similar enough to be interchangeable. And, uh, the increase of price of one means the increase for the demand of the other. Like, uh, like butter and margarine. They are pretty much used for the same purposes. Margarine’s butter’s substitute and you can bake equally well with either. Well, when the price of butter goes up, it becomes less affordable, and so what do people do? They buy margarine instead, right? So, uh, you see, increase of the price of butter increases the demand for margarine.
Now, another instance with the price of one product can influence the demand of another is, uh, is when you have two products that can’t be used without each other.
Those products we call “complement goods”. They complement, or complete, each other, if you will. Like compact disks and compact disk players. You need both products in order to use either. So if the price of either product increases demand for both is likely to decrease. And if the price of the CD’s goes up, well, demand for them will do down, right? And because CD’s and CD player complement each other, what will also happen is that the demand for CD player will go down, too.
一.在文章中有一些可以帮助我们解题的关键词汇，现在就跟着前程百利小编一起来学习吧!
(1)和经济学有关的一些词汇
1. demand：n. 要求;需要
He said the task of reconstruction would demand much patience, hard work, and sacrifice.
2. consumer：n. 消费者;用户，顾客
She said no consumer will buy a GPRS service if that is how it is advertised
3. expensive：adj. 昂贵的;花钱的
Broadband is still more expensive than dial-up services.
3. substitute goods：替代物品
Part of the reason is that substitute goods are easily available.
4. substitute：vt. 代替
In my experience a straight substitution of carob for chocolate doesn't work.
5. affordable：adj. 负担得起的
The impact of a repeal of the Affordable Care Act would not be solely financial.
6. complement goods：互补品
AUSM could be applied hi combinatorial auction where goods in combination are complement.
(2)可以帮助我们解题的重点词汇
1. refer：vi. 参考;涉及;提到;查阅
In his speech, he referred to a recent trip to Canada.
2. interchangeable：adj. 可互换的;可交换的;可交替的
His greatest innovation was the use of interchangeable parts.
3. margarine：margarine
There was no difference between the groups, no matter what kind of margarine they ate
4. compact disk：光盘，高密度磁盘
Like most of the Internet appliances on show here, EasyNow shuns standard desktop features like the floppy disk drive and prides itself on its compact size
5. decrease：vi. 减少，减小
Of patients who had pain, 31% reported a significant decrease after a healing service.
6. go down：下降;平静下来;传下去;被接受
Income from sales tax went down
二.那么在这类话题中经常出现的词汇还有哪些呢?
1. consumerism：n. 保护消费者利益运动;用户至上主义
They have clearly embraced Western consumerism.
2. affluence：n. 富裕;丰富;
The postwar era was one of new affluence for the working class.
3. subsistence：adj.自给自足的
Many Namibians are subsistence farmers who live in the arid borderlands.
4. subsistence level：勉强糊口的生活水平
Most remained mired in subsistence level agriculture until suddenly advances in the Anglosphere catapulted living standards forward.
5. commodity：n. 商品，货物;日用品
Prices went up on several basic commodities like bread and meat.
6. withdraw：vt. 撤退;收回;撤消;拉开
He reached into his pocket and withdrew a sheet of notepaper.
7. bank loan：银行贷款
Tepco originally sought to have the bank loan balance maintained for the next 10 years
以上就是前程百利小编要和大家分享的托福口语考试中的关于经济学的一些经常出现的词汇，希望可以帮助大家备考!如果想了解更多备考资料，欢迎登陆前程百利论坛，最后预祝每一位考生都能考出好成绩。
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