It's a phenomenon that occurs anywhere you have a large lake that doesn't freeze and have cold air flowing over it, mostly in the Northern Hemisphere Like the great lakes in the United States.
这种现象发生在不结冰的大湖泊附近，这些湖通常被冷空气包围着，并且它们大多数坐落在北半球，就像美国的五大湖一样。
五大湖在哪里？
Scientists studied the Great Lakes in America and the Arctic Ocean in northern Canada.
科学家们研究了美国的五大湖和加拿大北部的北冰洋。
The residence times for the Great Lakes of North America, namely, Lakes Superior, Michigan, Huron, Erie, and Ontario, are, respectively, 190, 100, 22, 2.5, and 6 years.
北美五大湖，也就是苏必利尔湖、密歇根湖、休伦湖、伊利湖和安大略湖，它们的停留时间分别是190年、100年、22年、2.5年和6年。
East to the Atlantic Ocean, extensive trade networks extended from the Great lakes to the Gulf of Mexico.
往东靠近大西洋，广袤的贸易网覆盖了从五大湖到墨西哥海湾。
"That's enough to show that they're likely making their way into the lakes," says Lindsay Chadderton, director of TNC's Great lakes Aquatic Invasive Species program.
“这足以说明他们有可能在向那里进军。”TNC五大湖水生入侵物种项目主管林赛。查德顿说。
The two great lakes continuous, hydrological cycle all match Leonardo's observations about how the landscape we see today was shaped by the power of water.
两条大河持续不断的冲刷循环造就了我们今天所看到的风景。
The scenery is just wonderful. Somewhere – great lakes.
这里的风景美极了，大湖区的某处。
In Alaska and the great lakes region of north America winter activities include ice fishing, hunting, cross-country skiing and snowmobiling.
在阿拉斯加以及北美的五大湖地区，冬天的室外活动包括冰上钓鱼，打猎，越野滑雪以及雪地摩托。
An important protection came in 2008, when George Bush signed the Great Lakes Compact.
2008年，乔治·布什签署《大湖契约》，形成一项重要的保护措施。
Within three miles of the Atlantic coast, or on the Great Lakes, stateshave jurisdiction — and some have not even begun the rule-makingprocess.
在大西洋海岸三英里内，或五大湖上，各州拥有司法权——而有些州甚至还没有开始制定规则。
All eight Great Lakes states must approve the plan.
大湖区的八个州地必须都支持这项计划。
Lake Baikal in southern Siberia is the world's oldest and deepest lake, containing more water than all of North America's Great Lakes combined.
西伯利亚南部得到贝加尔湖是世界上最古老和最深的湖，它的湖水比所有北美的大湖的湖水加起来还多。
The part of central Africa he was investigating, round the headwaters of the Nile and the Great Lakes, was the darkest part of the continent's dark heart.
库特兹调查的中非这一区域，位于尼罗河及大湖的源头附近，这里曾是非洲大陆黑暗腹地中最幽暗的部分。
From Detroit's grey streets to the lovely bays along the Great Lakes, it teems with plans for future prosperity.
从底特律灰色的街道到大湖区美丽的湖湾，都充斥着实现未来繁荣的规划。
For example, gray wolves in the Western Great Lakes region breed in February to March, while gray wolves in the arctic may breed a few weeks later - in March to April.
比如，灰狼在西部大湖地区一般会在二月到三月繁殖后代而在北极的灰狼会晚上几个星期-一般是三月到四月。
Environmentalists and Great Lakes governors outside of Illinois who want to close the Chicago locks claim it's the best short-term option.
环保主义者和伊利诺伊州以外大湖区的州长们想要关闭芝加哥船闸，他们声称这是眼前最好的选择。
And ships can reach the Atlantic Ocean from the Great Lakes through the Saint Lawrence Seaway.
而船只则能够从五大湖经过圣劳伦斯航道到达大西洋。
The Mississippi River system and the Great Lakes are connected only through the man-made Chicago Sanitary and Ship Canal, which leads from Lake Michigan to the Illinois River.
密西西比河流域与五大湖之间唯一的纽带是人工挖掘的芝加哥环境卫生和航行运河，它连接于密歇根湖与伊利诺斯河之间。
The western rift includes the Virunga and Rwenzori mountain ranges and several of Africa's Great Lakes, where the deep rift has filled with water.
裂谷的西侧有维龙加山脉和鲁文佐里山脉以及几个因深深的裂谷充满水而形成的大湖泊。
Great Lakes states continue to have their own unique water problems, however.
然而，五大湖流域的州地在水上的特殊问题仍继续存在。
The new project will aim to resolve differences between them while yielding new information about the carp threat, said Marc Gaden, spokesman for the Great Lakes Fishery Commission.
大湖渔业委员会的新闻发言人马克盖登表示，新的项目将致力于消除加拿大和美国两个项目的差别，并对鲤鱼威胁提供新的信息。
The toxins were dumped while an electrical barrier normally used to prevent any Asian carp from the Great Lakes was turned off for maintenance.
在投放毒素的同时，一个平时用来防止亚洲鲤鱼进入五大湖的电网被关闭并进行维护。
I encourage all the countries of the Great Lakes region to fully implement it.
我鼓励大湖区所有国家全面遵守这一议定书。
Now the Great Lakes states are reconsidering their main asset.
如今，大湖区正在重新审视其重要财富。
The biggest number of vulnerable seats lie in the region bordering the Great Lakes, in states such as Indiana, Michigan, New York, Ohio, Pennsylvania and Wisconsin.
对于那些有变数的席位有着最大影响的选民位于五大湖区域，在诸如印第安纳州，密歇根州，纽约，俄亥俄州，宾州以及威斯康辛州。
The past year has seen a torrent of measures to keep the Great Lakes free of them.
去年采取的一系列的举措使得五大湖区这些鱼类的踪影消失了
The past year has seen a torrent of measures to keep the Great Lakes free of them.
去年采取的一系列的举措使得五大湖区这些鱼类的踪影消失了
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