Plankton and nekton are pelagic organisms.浮游生物和自游生物都是海面的生物.The fish live on the plankton.这种鱼靠吃浮游生物为生。Plankton is at the bottom of the marine food chain.浮游生物处于海洋食物链的最底层.Krill swam with the plankton , a school of young men...
...armoured personnel carriers and other heavy vehicles.装甲兵员运输车和其他重型车辆German armoured divisions pierced the Russian lines.德国装甲师突破了俄国的防线。There were armoured personnel carriers and tanks on the streets.街上有装甲运兵车和坦克。Our armo...