The hostages were traded for arms.

人质被用来换取武器。

The demi-monde of arms deals.

从事武器交易的半上流群体。

They renounced violence and laid down their arms.

他们声明弃绝暴力并放下了武器。

[no obj.]the paramilitaries admitted to the illegal possession of arms.

准军事组织成员承认非法拥有武器。

The laying down of arms is basic to the agreement .

放下武器是达成协议的基础。