defencesn.防御工事名词defence的复数形式.=defenses.defencen.防御；答辩；防务Defence Teleprinter Network国防电传网defence development strategy国防发展战略Defence Surplus Sales Office国防剩余物资销售处Defence Intelligence Officer国防情报官defence documentation center[计] 国防文献中心Defence Update International《国际现代防务》Defence Industry Directorate国防部国防工业处Defence Information Sciences国防情报科学defence communication system[计] 国防通信系统Defence Council Instructions防御委员会指令