The doves were cooing in the trees.鸽子在林中咕咕啼鸣.They came backstage afterward, cooing and toadying to him.她们随后来到后台，对他娇语谄媚。They sat there billing and cooing till after midnight.他们坐在那里窃窃私语直到后半夜.the sound of pigeons cooing鸽子咕咕...
Pigeons fluttered in and out, cooing gently.鸽子们低声咕咕地叫着，扑扇着翅膀飞进飞出。the sound of pigeons cooing鸽子咕咕的叫声A pigeon strutted along the roof, cooing rhythmically.一只鸽子沿着屋顶大摇大摆地走, 有节奏地咕咕叫....
飞艇在海面打圈子.The airship circled at sea.必要时，飞艇能在那里停留数天以躲避危险。If necessary, the airship can stay up there for days to keep out of danger.飞艇在几秒钟里烧成灰烬.The airship was completely burnt in a few seconds....
Difficulties arise in attempting to understand the mechanisms of antiarrhythmic drug action for several reasons.在企图了解抗心律失常药物作用的机制中产生某些困难是有一些原因的.Objective To assess the antiarrhythmic effect of implantable Cardioverter de...