海防: Haiphong coast defence大: big; large前线: front; frontline海防最前线: the guardian大前: omae; osaki海防: 1.(越南河内的输出港) haiphong2.(在沿海地区和领海内布置的防务) coast defence◇海防部队 coastal defence force; 海防军务 seaward; 海防工程 coast defence engineering; 海防雷达 coast defence radar; 海防前哨 outpost of coastal defence; 海防 (前)线 coastal front; 海防艇 coastal defence boat前线: front; frontline 前线国家 a frontier country; 上前线 go to the front; 远离前线 far from the frontline; 站在斗争的最前线 stand right in the forefront of the struggle; 前线航空兵 frontline air force 海防, 沿海防务: coastal defense大前洞: taejon dong; taejon-dong大前锋: power forward; power foward大前均: hitoshi omae大前门: forever daqianmen大前年: three years ago大前提: [逻辑学] (演绎推理中包含一般性知识的前提) major premise; sumption大前天: three days ago海防(越南): hai-phong海防报: hai phong; hai-phong海防道: haiphong road海防舰: coast defense ship; frigate海防林: shelter belts to protect sea coasts海防市: haiphong; hi phòng海防艇: coastal defence boat海防线: coastal front国防大臣: defence department; defence minister; minister of defence; secretary of state for defence国防大机密: the steps; the thirty-nine steps