在这里树起的拒自由于外的屏障是什么?What was the barrier to freedom that had been erected out here?他在地上树起了一根杆子.He set a post in the ground.为什么要树起这些围墙, 篱笆来阻挠男女之间自然的关系?Why the walls and the fences preventing open, natural relationships betw...