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1、学 海 无 涯 Unit 1 The Perfect Swarm Narrator Damage from swarms of locusts can reach disastrous proportions A single swarm of desert locusts can consume over 70 000 metric tons of vegetation a day There is however one continent that s locust free North America 旁白 蝗虫群的伤害可以达到灾难性的程度 一个单一的沙漠蝗虫可以消耗超过 70000
2、吨的 植被一天 然而 有一个大陆是蝗虫自由 美国北部 Interestingly enough this wasn t always true For hundreds of years the Rocky Mountain locust was a common pest in the American West Back in the mid 1800s thousands of pioneers journeyed across the U S in search of free land and new opportunities They settled on the frontie
3、r of the western states and began to farm the land intensively growing corn and other crops 有趣的是 这并不总是真实的 几百年来 落基山脉的蝗虫是美国西部的一种常见害虫 早 在 19 世纪中叶 成千上万的先驱者跨越美国在自由的土地和寻找新的机会 他们定居在西 部边境 并开始对土地进行集中耕种 种植玉米和其他农作物 Then in 1875 out of nowhere a rare combination of air currents drought and basic biology produce
4、d the right conditions for an unthinkable event the worst storm ever recorded the perfect swarm It came over the horizon like a strange dark cloud Not millions not billions but trillions of insects sweeping through the land like a living tornado Those who saw the incredible event and survived never
5、forgot what they witnessed 然后 在 1875 走出无处 一个罕见的组合 空气电流 干旱 和基本生物学产生了正确 的条件为一个不可想象的事件 最坏的风暴有史以来 完美的群 它在地平线上像一个奇 怪的 黑暗的云 不是上百万 不是数十亿 而是数以万亿计的昆虫 像一个活生生的龙卷 风席卷过大地 那些看到了令人难以置信的事件 并幸存下来的人从来没有忘记他们见证了 什么 The swarm came together over the state of Texas and soon moved quickly across the frontier in a huge dest
6、ructive cloud that was nearly 3 000 kilometers long The storm spread north towards North Dakota The locusts eventually went as far west as the Rocky Mountains leaving a path of devastation and destruction wherever they went 群聚在德克萨斯州的上空 并很快在一个巨大的破坏性的云 是近 3000 公里长的边界迅速 移动 风暴向北到了北 蝗虫最终在落基山脉的西部 离开了一条破坏性
7、的道路和毁灭的道 路 An account from one person who observed the swarm described the locust storm The locusts came down from the sky like hail Frightened people ran screaming into their homes as the locusts claws dug into their skin and hung upon their clothing They heard sharp cracks as the insects came unde
8、rfoot The large locusts were everywhere looking with hungry eyes turning this way and that Their bodies blocked the sun bringing darkness along with the destruction 一个来自一个人的帐户 观察到群描述了蝗虫风暴 蝗虫从空中落下如冰雹 当蝗虫的爪子 被挖进他们的皮 挂在他们的衣服上时 吓得人们尖叫着进入他们的家里 随着昆虫来踩在 脚下他们听到尖锐的裂缝 大蝗虫到处都是 看着饥饿的眼睛转动着这样的方式 他们的身 体挡住了太阳 带来了黑暗
9、与毁灭 Crop damages were absolutely astonishing If such destruction were to happen today it would cost an estimated US 116 billion more than the most costly hurricane in American history And then something remarkable happened the Rocky Mountain locust simply vanished 农作物的损害是绝对惊人的 如果这样的破坏将发生在今天 它将花费大约 1
10、16 美元 超过 学 海 无 涯 了美国历史上最昂贵的飓风 然后 一些非凡的事情发生了 落基山脉的蝗虫简直就消失了 At the University of Wyoming entomologist Dr Jeff Lockwood has spent over a decade investigating why the Rocky Mountain locust disappeared 在怀俄明大学的昆虫学家杰夫博士 她已经花了超过十年调查为什么落基山蝗虫消失 Dr Jeff Lockwood University of Wyoming There were probably more l
11、ocusts in the largest swarm than there are stars in the Milky Way trillions Not only is something of that scale and magnitude and power gone but it s gone within a few years It s not as if we had a tremendous series of earthquakes or tidal waves or forest fires And so it doesn t make sense that it c
12、ould ve gone extinct There s no reason for it to have done so It s a great mystery 杰夫博士 怀俄明大学洛克伍德 有可能是更多的蝗虫在最大的群有比银河系中的恒星万 亿 这不仅是一种规模和规模和力量去了 但它在几年内消失了 这并不是因为我们有一系 列的地震或海啸或森林火灾 因此 它没有意义 它可能已经灭绝 没有理由这么做了 这 是一个伟大的奥秘 Narrator It s a mystery that Lockwood is determined to solve Whatever wiped out the Ro
13、cky Mountain locust changed American history Exactly what could have destroyed a plague nearly 3 000 kilometers long Lockwood is on the case He starts the investigation with the victim itself Unfortunately very few locust specimens exist and those that do are often in bad condition 旁白 这是一个谜 她下决心要解决
14、无论是什么 消灭了落基山脉的蝗虫改变了美国历史 到底是什么能摧毁一个瘟疫近 3000 公里长 洛克伍德的情况 他开始调查受害者本身 不 幸的是 极少数的蝗虫标本存在 那些做的往往是在恶劣的条件下 Dr Lockwood So what we have is a body of evidence of the victim in its dying moments alright but we don t know what the life of the victim looked like when it was flourishing The next opportunity we hav
15、e for a major set of clues is locked up in the ice of the glaciers of the Rocky Mountains Lockwood 博士 我们是在死亡的时候 身体的受害者的证据 好吧 但是我们不知道受害 者的生活看起来像当它蒸蒸日上 下一次机会 我们要一大套线索被锁在冰的岩石山脉的冰 川 Narrator Lockwood is headed to Knife Point Glacier Wyoming not far from Yellowstone National Park For centuries strong win
16、ds would sweep swarms of locusts high into the mountains where they would freeze to death 旁白 洛克伍德前往刀点的冰川 怀俄明 离黄石公园不远 几百年来 强风将蝗虫群中的 蝗虫群高到山上 在那里它们将被冻成死亡 Dr Lockwood These glaciers serve as both traps and sort of icy tombs for the Rocky Mountain locust Were we looking at a long slow death or were we looking at a sudden demise Lockwood 博士 这些冰川作为陷阱和落基山蝗虫冰冷的坟墓排序 我们是在寻找一个漫长 缓慢的死亡 还是我们在看着一个突然死亡 Narrator By extracting DNA samples from specimens frozen over a period of time Lockwood may be able to specify
