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科学家深入海底进行研究时,他们身后常常带着一群经过训练的海豚。这些海豚有的来往于水面船只与海底之间,运送仪器和物品;有的在实验海域四周巡逻,
Scientists often carry a group of trained dolphins behind the sea when they carry out research. Some of these dolphins travel between surface vessels and the seafloor, transporting instruments and objects; others patrolling around the experimental sea,