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     Go forth and multiply
     一往无前，生生不息

     Mar 2nd 2006
     From The Economist print edition
     WHAT makes for a successful invasion? Often, the answer is to have better weapons than the enemy. And, as it is with people, so it is with plants—at least, that is the conclusion of a p_______① published in ★Biology Letters[1] by Naomi Cappuccino, of Carleton University, and Thor Arnason, of the University of Ottawa, both in Canada.
     怎样才能成功入侵？答案常常是：拥有比敌人更好的武器。人是这样，植物也是如此——至少，《生物书简》上发表的一篇论文是这么认为的，作者是来自加拿大加里敦大学的纳奥米 卡普奇诺和渥太华大学的索尔 阿纳森。
     The phenomenon of alien species ★popping up[2] in unexpected parts of the world has grown over the past few d________② as people and goods become more mobile and （1） plant seeds and animal larvae have ★hitched[3] along for the ride . Most such aliens blend into the ecosystem in which they arrive without too much fuss. (Indeed, many probably fail to establish themselves at all—but those failures, of course, are never noticed.) Occasionally, though, something ★goes bananas[4] and starts trying to take the place over, and an invasive species is born. Dr Cappuccino and Dr Arnason asked themselves w_______③.
     过去的几十年，随着人和货物的流动日益频繁，植物种子和动物幼体也乘机“搭便车”四处播散，世界各地无意间出现了越来越多的外来物种。这些外来物种大多数都轻而易举地融入了所到之处的生态系统。（事实上，许多物种可能还没有站稳脚跟——当然，人们从未注意到这一点。）不过，偶尔也有某些物种疯狂繁殖，开始企图占领原有物种的生长空间，一种入侵物种就这样形成了。卡普奇诺和阿纳森对此感到百思不得其解。


附件：考研读译参考《经济学家》——一路繁衍