主要原因有：一，他们代表的是基层老百姓的力量，所以说有很广泛的大众基础。

Many reasons accounting for this are as follows: first, they represent the power of "grassroots" people, so that there is broad public basis for them.

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例如，建立在现有技术基础上的新技术还没有建立足够的基础来吸引大众。

For instance, new technologies that are building upon existing technology have not found their footing well enough to appeal to a mass audience.

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简单利润分析学理应是大众学科的基础课程之一，并不是只有学经济学的人才学的。

Simple cost benefit analysis could also be considered a part of basic citizenship, not some geeky technique that only economists need to learn.

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