sea-bed insertion埋藏海底泥土中
sea-bed mine海底水雷
sea-bed reverberation海底混响
sea-bed mineral海底矿产
sea-bed pipeline海底管道
sea-bed topography海底地貌
sea-bed disposal海床处置
sea-bed area海底区域;海床区域
sea-weed bed繁藻地
N-SING（单数型名词） The seabed is the ground under the sea. 海床
The wreck was raised from the seabed in June 2000.
沉船于2000年6月从海底打捞上来。