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...
The mechanics of staging a play are very complicated.排演话剧的过程很复杂.Peter Mumford's lighting and David Freeman's direction make a crucial contribution to the success of the staging.彼得·芒福德的灯光和戴维·弗里曼的导演对演出的成功功不可没。Fiv...