defencesn.防御工事名词defence的复数形式.=defenses.defencen.防御；答辩；防务Defence Sales Organisation防务产品销售机构Defence Intelligence Staff防务参谋机构Defence Combat Maneuvering防御作战机动defence to criminal charge刑事检控的答辩defence reaction of fatigue疲劳保护反应Defence Signals Directorate国防信号指导Defence Animal Support Unit动物防御支援单位Defence Force Service Medal防御部队服务勋章defence of missile position导弹阵地防卫Defence Suppression Vehicle防御镇压车辆