piranhas

Yet it is vital to the survival of humans and a wide range of critters from dragonflies and piranhas to beavers and bullfrogs .

不过，它对于人类的和家畜的生存是必要的，从蜻蜓和水虎鱼到海狸和牛蛙都离不开它。

But as Teddy Roosevelt observed , a school of piranhas won 't shy away from size alone , so the giant arapaima evolved armor to withstand the bites .

但是据泰迪·罗斯福观察，水虎鱼群不会被体型吓倒，所以巨骨舌鱼为抵挡啮咬而进化出了一副盔甲。

There are more than twenty different species of piranhas in the wild .

在自然环境中，总共有二十多种不同的食人鱼。

Libya , the Americans insist , is a completely different kettle of piranhas .

美国坚称，利比亚的情况则完全不同。

It 's all right for you two . You 're used to being social piranhas ... I 'm a very popular person usually .

你们不会有什么损失的，反正早习惯当社交食人鱼了…可我通常人气很高的。

During the rainy season when food is plentiful , piranhas eat more plants and insects .

在雨季食物丰富时，食人鱼多数吃植物和昆虫。

Piranhas are freshwater fish that are found in rivers and floodplains of South America .

食人鱼是一种淡水鱼类，多发现于河流及南美涝原上。

The researchers are now interested in whether piranhas vocalize during mating .

研究人员现在研究，食人鱼在交配时是否发声。

But when the piranhas threatened each other over food , they produced a barking sound .

但是，当它们因为争夺食物而互相恐吓的时候，就会发出一种吠叫声。

Piranhas have long terrorized American audiences , with their ferocious appetites and need for meat .

比拉食人鱼一直让美国观众感到恐怖，它们生性凶残，爱吃肉食。

Each type of piranhas module have waterproof and not waterproof types , each module is red , yellow , blue green color options .

每种型号的食人鱼模块都有防水少不防水类型，每种模块均有红、黄、白、蓝、绿颜色可供选择。

It is more likely , though , that piranhas will eat smaller fish or their own if desperately hungry .

但通常食人鱼在极度饥饿时会捕食更小的鱼类或者互相残杀。

Piranhas occasionally bite humans or other mammals when very hungry or threatened , but serious attacks are extremely rare .

但在饥饿或者受到威胁时，食人鱼偶尔会攻击人类或其他哺乳动物，但很少出现严重袭击事件。

So it may surprise you to learn that piranhas are not the bloodthirsty killers portrayed in films .

所以当了解到食人鱼并非如电影里刻画的那样残忍嗜血时，你肯定会感到惊讶。

Piranhas , red fire ants and Emperor scorpions have been intercepted in mail parcels to Hawaii .

寄往夏威夷的邮包中曾截获出水虎鱼，红火蚁和帝王蝎。

According to a recent scientific study , despite their fearsome reputation , piranhas are wimps that gather in large groups to protect themselves from predators .

食人鱼历来以凶险著称，但最近的一期科学研究显示，其实食人鱼也是本性比较懦弱胆小，他们大批聚集在一起，主要是为了自我保护。

But if piranhas would be out of the beach , just imagine blood all over the water , on the boats , and maybe even close on the shore .

但现在海滩边又来了食人鱼！想象一下到处都是鲜血的场面，水里、船上、甚至岸上！

Like a pit bull , piranhas will tear the flesh from your bones . Also like a pit bull , they bark . [ piranha audio type 1 ] Kind of .

如同斗牛一样，食人鱼可以撕出人骨头中的肌肉，它们也会像斗牛一样的吼叫[食人鱼音频类型之一]。

Liuzhou 's municipal authorities in Guangxi on Wednesday placed a heavy bounty on piranhas recovered from its waters , and would offer 1,000 yuan for every piranha caught , China News Service reported .

据中新社报道，周三，广西柳州市官方悬赏钓剿所辖水域中的食人鱼，每条奖励1000元。

But they 'll have to travel to Brazil to study this in the wild - turns out that when it comes to mating in captivity , piranhas say , " no tanks . "

他们只有旅行到巴西才能进行这项野外研究——寻找在圈养的情况下，食人鱼什么时候开始交配，但食人鱼却说：“要在没有水网箱的地方才能交配。”

Although a single piranha might make a nice meal for a dolphin or a cormorant , their tendency to swim in schools of hundreds keeps most predators at bay , so piranhas live a largely lawless life .

虽然单个水虎鱼可能成为海豚或鸬鹚口中的美餐，但是它们喜欢几百条一起成群结队出现的习性让大部分敌人敬而远之，因此，水虎鱼几乎过着无法无天的生活。