he has been confined to bed with flu for the past couple of days：他因患流感,已經(jīng)幾天未下床了

醫(yī)院床位短缺. there's a shortage of hospital beds. | 他因患流感,已經(jīng)幾天未下床了. he has been confined to bed with flu for the past couple of days. | 海洋層 the ocean bed

occurrent：正在發(fā)生的

occurrence 發(fā)生 | occurrent 正在發(fā)生的 | ocean bed 洋底

ocean floor：海底

往昔對(duì)於深海床(deep sea-bed),海床(sea-bed),海底(Ocean floor)及底土(sea-soil)礦藏資源之開發(fā),認(rèn)為渺不可及. 近年深海床之無限蘊(yùn)藏與技術(shù)可能性,使海底資源之開發(fā),形成新的活動(dòng)與新的爭(zhēng)議. 一般而言,

sea-bed area：海底區(qū)域

sea-bed and ocean floor;海床洋底;; | sea-bed area;海底區(qū)域;; | separators with high capacity/modest separation factor;高容量/較低分離系數(shù)的分離器;;

seasonable duty：季節(jié)稅

*sea-bed and ocean floor 海床洋底 | *seasonable duty 季節(jié)稅 | *seasonal worker 季節(jié)性工人

ocean basin：大洋盆地

ocean basin floor 洋盆區(qū) | ocean basin 大洋盆地 | ocean bed 海底