1.Armguard hook, as a defensive weapon, is usually used by boors.
护手钩一般为粗人用，作为武术器械刁蛮难防，用之最有名者为窦尔敦。
2.This defensive weapon is a landmine constructed by military engineers and fired by the defenders lighting a fuse.
这种防御性游戏装备武器是一种简易的原始地雷，在战前由工兵埋设并在恰当的时机点燃引信引爆。
3.BAE Systems will develop an interim all-quadrant defensive weapon system for the CV-22 Osprey aircraft.
BAE系统公司将为CV-22“鱼鹰”飞机开发一种临时的四象限防御武器系统。
4.Science becomes, in their hands, not only a defensive weapon, but still more frequently an offensive one;
科学在他们的手里不仅仅是一件防御性武器，而更常常是一种进攻性武器。