海豚的性格特点: curious,playful,gentle,smart,friendly 海豚游泳时的动作:swim,jump,dive,turn,rise,leap,chase 海豚的身体结构: lung,blowhole, head, skin,body,tail, mouth,fipper, fin, back, snout, tooth 与海豚叫声有关的词: whistle,chirp,squeak,squeal in charge of...主管·....;负责...... watch for... 观察等待...... hold one's breath 屏住呼吸 get along well 相处得好 be tightly packed 紧密地压在一起 时间状语从句: Acalf can swim as soon as it is born. it 作形式主语: It's hard for dolphins to see the little fish they like toeat on the ocean floor. 介词短语作方式状语:Adolphin can find afish by seeing it withsound! 条件状语从句: Ifa dolphin is hunting alone,it will put its head to theground and make a clicking noise. 定语从句: The long-finned pilot whale is a dolphin that can divealmost 2,000 feet!