The professor used a graph to explain the principles of economics.
教授用图表解释经济学原理。
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(英语一) 
学人-科技
精听 
学人-综合
精听 So if I'm very interested in economics and healthcare costs, I'm just going to write about that, because I can guarantee that I know that vocabulary, I know the topic, and it doesn't matter whether or not I agree with it necessarily.
所以如果我对
学和医疗成本感兴趣,我会继续写这方面的内容,因为我可以确保我知道那方面的词汇和话
,而我
否同意这些观点并不重要。