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挪威科学家正在研究如何吸引鲑鱼吃食的方法。养在网箱里的鲑鱼抢食饲料的时间很短,因为饲料会很快沉入箱底。如果网箱很大,有时鲑鱼还未发现投下的饲料,饲料
Norwegian scientists are studying ways to attract salmon to eat. Salmon caught in cages have a very short feed because the feed sinks quickly into the bottom of the box. If the cages are large, sometimes the salmon has not found the feed, feed dropped