对于鲑鱼来说这可以使河水足够冷并且常年不冻。
That makes streams cool enough for trout and keeps the rivers flowing.
吃鲑鱼是为了身体健康，但是，超市受资本控制，期望生产价格便易的冻鱼片。
Diners have gravitated to the health benefits of the fish, and supermarkets have capitalized by producing cheap fillets.
专家说，对于喜欢从超市冰柜中取出鲑鱼生鱼片或冻鱼片以获取有利于心脏健康蛋白质爱好者而言，希望的是鲑鱼产量的缩减，价格的上升。
For fans of salmon nigiri or frozen fillets plucked from supermarket freezers for quick, heart-healthy protein, expect salmon portions to shrink - and prices to grow, experts say.
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