士兵们用装甲车围成一圈，迅速建立起一个防御阵地。

The soldiers quickly formed a ___laager with their armored vehicles to set up a defensive position.

探险者将车辆围成一圈形成防御阵型，以便安全过夜。

The explorers ___laggered their vehicles in a defensive circle to spend the night safely.

封闭的社区有时会形成一种排外的心态，拒绝接受新观念。

Some gated communities develop a ___siege mentality, shutting out new ideas.