n.壁垒；保障；防波堤
(复) bulwarks:（船的）舷墙.
v.用堡垒防护
Our people's support is a bulwark against the enemy. 人民的支持就是抗拒敌人的堡垒。
The dam will be a bulwark against floods. 这防波堤可以堤防洪水。
