thebottomofthesea;seabed;seafloor;benthos(benthon);DavyJones'sLocker◇海底爆破seabedblasting;海底采掘[矿物]ocean-mine;海底采矿[采矿工程]submarinemine;submarine[undersea;offshore]mining;海底采矿设备oceanfloorminingequipment;海底采煤underseamining;海底采样seafloorsampling;海底测量oceanfloortopographicsurvey;海底测图submarinemapping;海底沉积物bottomsediment;海底地貌submarinegeomorphy;海底地形seafloorrelief;submarinemorphology;海底地形图oceanfloorreliefmap;海底地震仪seaseismograph;海底地质学submarinegeology;海底电报submarinetelegraph;cablegram;海底电报线路submarinetelegraphline;海底电话电缆submarinetelephonecable;海底电缆submarine[undersea]cable;海底动物infauna;海底断裂带submarinefracturezone;海底峰seapeak;海底高地seahigh;海底高原plateau;海底谷seavalley;海底管线submergedpipeline;海底火山submarinevolcano;海底开发技术oceanfloorexplorationtechnique;海底勘察submarineexploration;海底矿床underseamineraldeposit;海底裂谷submarinerift;海底漫游动物vagil-benthon;海底平原sea-bottom[submarine]plain;海底山seamount;海底摄影器benthograph;海底生物benthon;海底石油开发submarineoilexploitation;海底隧道submarinetunnel;海底探测船habitat;海底通信电缆submarinecommunicationcable;海底峡谷submarine[ocean(ic)]canyon;海底养殖bottom[submarine]culture;海底油管输送offshoreoildelivery;海底油库submergedtank;海底油田offshoreoilfield;海底钻探offshoreboring[drilling];海底资源seabed[submarine]resources