在那儿火蚁每年造成60亿美金的损害。
S. where the fire ants wreak some $6 billion in economic damage annually.
这是一个火蚁不能赢的战斗。
很多年来，火蚁只是限制在佛罗里达和德克萨斯州。
For many years, the fire ants seemed confined to states such as Florida and Texas.
火蚁原来分布于南美洲，75年前来到了美国。
The ants originally hail from South America and spread to the United States 75 years ago.
夏季恼人害虫还包括蜜蜂、黄蜂、火蚁和蚊子。
Bees, wasps, fire ants and mosquitoes are other painful pests of summer.
因为没有天敌，火蚁的种群密度达到阿根廷的十倍甚至百倍。
With no natural enemies, their densities reached 10 to 100 times that of Argentina.
它们分析来自不同洞穴火蚁的遗传物质来判断它们所属的群落。
They then analyzed the genetic material of one ant from each colony to classify the populations into related groups.
火蚁是一种带有毒刺的小昆虫，即使是踩到它们的巢穴都足以使你进医院。
For a tiny insect, red fire ants pack a nasty sting. Stepping on a nest can put you in the hospital.
火蚁是一种带有毒刺的小昆虫，即使是踩到它们的巢穴都足以使你进医院。
For a tiny insect, red fire ants pack a nasty sting.Stepping on a nest can put you in the hospital.
你应该可以猜到：美国的东南部。在那儿火蚁每年造成60亿美金的损害。
You guessed it: the southeast U.S. where the fire ants wreak some $6 billion in economic damage annually.
不过，你要是抓一大把火蚁扔进水里的话，第二天再来看，它们还在水上飘着呢，死不了。
But throw a group of fire ants into the water, come back the next day, and they'll still be floating.
宠物在户外躺下享受阳光时，火蚁常常朝它们腹部进军，然后同时叮咬，这可是非常痛苦的体验。
Fire ants often march onto the abdomen of a pet lying outdoors enjoying the sun, then sting in synchrony, which is a very painful experience.
现在的遗传学研究表明，这些美国南部的火蚁并不是南美原产的那种，而是来自世界各地的生物入侵。
Now genetic studies show that the southern United States, not these native lands in South America, is the source of multiple new invasions around the globe.
火蚁在佛罗里达、路易斯安那和其他南部州快速蔓延，它们富有进攻性，建立了众多的巢穴，破坏了当地的景观。
They spread rapidly in Florida, Louisiana, and other southern states, driving out other ants and disrupting the landscape with prolific, aggressive colonies.
在那，两种不同的蚂蚁——阿根廷蚁和火蚁——正准备抢夺这个州164000平方英里的土地而打个你死我活。
There, two species of ants — Argentine and fire — are preparing to duke it out for the state’s 164, 000 square miles.
不管你要找白蚁、火蚁还是木匠蚁，第一个收罗了世界上已知所有11,000种蚂蚁的完整数据库都可以帮你解决难题。
Whether you're looking for white ants, fire ants or carpenter ants, the first complete database of the world's 11,000 known ant species can help you out.
这些火蚁迅速集结起来，一层上面其中一半的火蚁还是会身陷窘境，不过一些小气泡也许是帮助它们免受溺水之苦的救星。
The ants quickly group together. Half get stuck underneath in a single layer-but there are small pockets of trapped air that likely prevent them from drowning.
这些火蚁迅速集结起来，一层上面其中一半的火蚁还是会身陷窘境，不过一些小气泡也许是帮助它们免受溺水之苦的救星。
The ants quickly group together. Half get stuck underneath in a single layer-but there are small pockets of trapped air that likely prevent them from drowning.
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