Some species thrived(繁荣，茁壮成长) during the last ice age. Sabre-toothed cats, giant ground sloths, woolly mammoths and woolly rhinos all did pretty well. Others, however, were seriously inconvenienced—among them the chum salmon of north-western North America, which frequently found the rivers leading to and from their inland spawning grounds icebound.(然而，其他物种则严重受扰——其中包括北美西北部的狗鲑，它们经常发现通往内陆产卵地及返回的河流被冰封。)
有些物种在末次冰河时期繁荣兴旺。剑齿虎、巨型地懒、猛犸象和披毛犀都过得相当不错。然而，其他物种则严重受扰——其中包括北美西北部的狗鲑，它们经常发现通往内陆产卵地及返回的河流被冰封。
For those cut off(切断，隔绝) in the sea, this was a nuisance(麻烦事，讨厌的人或物). They had to make alternative arrangements, by seeking other, more accessible(可到达的，易接近的) bodies of fresh water in which to lay their eggs. Those cut off on the land side, though, were stuck. And it was assumed until recently that because they were unable to complete the marine part of their life-cycle, they died out.(直到最近，人们一直认为，由于它们无法完成生命周期中的海洋部分，它们已经灭绝了。)
对于那些被困在海中的鲑鱼来说，这很麻烦。它们不得不另作安排，寻找其他更容易到达的淡水水域来产卵。然而，那些被困在陆地一侧的鲑鱼则陷入了困境。直到最近，人们一直认为，由于它们无法完成生命周期中的海洋部分，它们已经灭绝了。
Not so, it turns out(结果是，证明是). A study published recently in Quaternary Research by Patrick Martin, an avid fisherman with a sideline as an amateur scientist, has employed genetics to show that some of the left-behinds not only endured, but thrived.(最近发表在《第四纪研究》上的一项研究，由帕特里克·马丁（一位热衷于钓鱼、兼做业余科学家的人）完成，利用遗传学表明，一些被留下的鲑鱼不仅存活了下来，而且繁荣兴旺。)
事实证明，并非如此。最近发表在《第四纪研究》上的一项研究，由帕特里克·马丁（一位热衷于钓鱼、兼做业余科学家的人）完成，利用遗传学表明，一些被留下的鲑鱼不仅存活了下来，而且繁荣兴旺。
All chums together
所有狗鲑聚在一起