Are the barriers intact? Clad, primary systems, secondary, containment.

这些障碍是完整的吗，覆盖层，主系统，次级系统，容器。

youdao

"There is value in the market for very well-located retail assets in secondary markets, where there are high barriers to entry and good demographic fundamentals, " he says.

WSJ: Plots & Ploys: Hole-Sale Real Estate