imperfections

Even with a magnifying glass I couldn't discern any imperfections in the porcelain.

即使有个放大镜，我也不能发上任何瑕点。

Considerable attention has been given to imperfections of information and of competition, to transaction costs, indivisibilities, and increasing returns, and to some of the relations among these.

而大量关注集中在信息不完善、竞争不完善、交易成本、不可分割性、递增收益、以及它们之间关系。