Hundreds of protesters blocked the entrance to the President's palace.数百名抗议者堵住了总统府的入口。Police blocked the entrance to the building.警方封锁了大楼的入口。A thicket of reporters blocked the entrance to city hall.一大群记者堵住了市政厅的入口。A fall of rocks blocked the entrance to the cave.落下的岩石阻塞了洞口。