摘要
在俄勒冈州和华盛顿州之间,有一条河叫作哥伦比亚河。这条河得名于伟大的探险家哥伦布。在哥伦比亚河中生长有一种很大的鱼,叫作大马哈鱼。大马哈鱼是咸水鱼,主要生活在海洋当中。可是,大马哈鱼又有一个奇怪的习性,它一定得在淡水中产卵。因此,每年到了产卵的季节,大马哈鱼妈妈就要从海里进入哥伦比亚河,逆流而上,找一处水势平静的地方产卵。可是,它如何才能通过这些瀑布呢?
Between Oregon and Washington is a river named Columbia,after Columbus.In the Columbia River are large fish called salmon.Salmon live in the salt ocean,but when Mrs Salmon wants to lay her eggs she goes way up the Columbia River,far above the falls to fresh water,looking for a quiet place to do so.How can she get by the falls?
