Pennypaper is a term referring to papers made widely available to the public.
大众报是一个术语，指的是大众广泛阅览的报纸。
2
But the phrase "pennypaper" caught the public's fancy, and soon there would be papers that did indeed sell for only a penny.
但是“便士报”这个词引起了公众的兴趣，很快就会有真的只卖一个便士的报纸了。
3
A chemistry professor at Harvard University is trying to shrink a medical laboratory onto a piece of paper that's the size of a fingerprint and costs about a penny.