So energy expert Eric Potter says it is too early to know how the new gas shale reserves will affect the market.

VOA: special.2009.10.23

So Eric brings us back to the puzzle we've been wrestling with since we started reading Locke.

埃里克把我们带回了最初,解读洛克理论时所困扰的问题。

耶鲁公开课 - 公正课程节选