Venomous snakes spit and hiss when they are cornered.
毒蛇在无法逃脱时会发出愤怒的呼呼咝咝的声音。
Probably back in some previous biology course you learned that snakes evolved from lizards, and that the first snakes weren't venomous and then along came more advanced snakes, the venomous snakes.
也许在以前的生物课上，你学过蛇是由蜥蜴进化而来的，而且最初的蛇是没有毒的，后来出现了更高级的蛇，也就是毒蛇。
Ok, venomous snakes are the ones that secrete poisonous substances or venom, like the snakes of the viper family or cobras.
毒蛇是一种分泌有毒物质或毒液的动物，像蝰蛇科的蛇或眼镜蛇。
They are classified as venomous snakes because they resemble them, their advanced features more than the other non-venomous snakes.
它们被归类为毒蛇，因为它们与毒蛇相似，它们的高级特征比其他不是毒蛇的蛇更明显。
Colubrids, and you probably heard this too, although they are often classified as venomous snakes, they are actually generally non-venomous.
黄颌蛇，你可能也听过这种蛇，虽然它们经常被归类为毒蛇，但实际上它们通常是无毒的。
If there are no truly non-venomous snakes, were the so-called non-venomous snakes, like constrictors and pythons, were they venomous at some point in their evolution?
如果没有真正的无毒蛇，那些所谓的无毒蛇，比如蟒蛇和巨蟒，在它们进化过程中的某个阶段是有毒的吗？
In most venomous snakes, like vipers and cobras, the venom is used to catch and inmoblize the prey; but in colubrids, venom drips onto the prey only after the prey is in the snake's mouth.
在大多数毒蛇中，如蝰蛇和眼镜蛇，毒液用于捕捉猎物、使其无法行动；但在彩颌类中，只有在猎物到了蛇嘴里后，毒液才会滴到猎物身上。
Or you may dream of tigers and venomous snakes.
或梦者到老虎、毒蛇。
An American set a record in 1999 kissing 11 venomous snakes.
1999年，一名美国人曾创下与剧毒蛇亲吻11次的记录。
We kept a vigilant eye out for alligators and for venomous snakes.
我们警惕地睁大眼睛，以防短吻鳄和毒蛇的出现。
There are many poisonous spiders and venomous snakes, so they can't eat grass.
因为有好多毒蜘蛛和毒蛇，所以他们不能吃草。
General population in knowing and being able to identify which venomous snakes live in their area.
大众了解并能够识别其所在地区的毒蛇类型。
These highly venomous snakes can reach six feet (two meters) long and weigh 40 pounds (20 kilograms).
这些剧毒的毒蛇长可达6英尺(2米)，重可达40磅(20kg)。
Many snake-bites, even by venomous snakes, are not envenomed , and these can be treated as animal bites.
许多蛇咬伤，即使是毒蛇，也不会中毒，还可以被视为动物咬伤。
Any of several venomous snakes of the family Elapidae, which includes the cobras, mambas, and coral snakes.
眼镜蛇眼镜蛇科中几种毒性剧烈的蛇的一种，包括眼镜蛇，树眼镜蛇和珊瑚眼镜蛇。
There are some venomous snakes to beware of, but really they're much more frightened of you than you are of them.
要注意一些有毒的蛇，但实际上他们非常害怕你而不是你害怕他们。
Indian mongoose is popularly used to fight and kill venomous snakes, because of their rapid reactions and thick coat.
据了解，印度猫鼬普遍擅于捕杀眼镜蛇，因为它们拥有快速的反应能力和厚厚的皮毛。
Any of several venomous snakes of the genus Cerastes, such as the horned viper, having hornlike projections over each eye.
角蝰蛇一种角蝰属毒蛇，如带角的蝰蛇，每只眼上都有角状突起。
He led you through the vast and dreadful wilderness, that thirsty and waterless land, with its venomous snakes and scorpions.
引你经过那大而可怕的旷野，那里有火蛇、蝎子、干旱无水之地。
The Black Mamba's bite is potentially fatal. Without treatment the mortality rate is 100%, the highest among all venomous snakes in the world.
黑曼巴的咬伤是极其致命的，没有进行治疗，其死亡率为100%，这是世界上在所有毒蛇中最高的。
Under the guidance of an animal expert, an 11-year-old boy sets foot into the forest for the very first time in search of cute frogs and venomous snakes.
在动物专家的陪伴下，11岁的钦儒走进一片陌生的森林，经历寻找青蛙与蛇的旅程。
He led you through the vast and dreadful desert, that thirsty and waterless land, with its venomous snakes and scorpions. He brought you water out of hard rock.
引你经过那大而可怕的旷野，那里有火蛇，蝎子，干旱无水之地。
Mr. Jackson converted a rustic red barn into a herpetarium with displays for a dozen exotic and venomous snakes, including a Burmese python and a monocled cobra.
不仅如此，杰克逊更将一个铁锈红乡村谷仓变成了一个奇珍异兽馆，展示众多来自异国的毒蛇，包括缅甸巨蟒和孟加拉独眼眼镜蛇。
The king cobra, the king cobra can grow up to around 5.7 meters, it is extremely venomous. It is the longest of the venomous snakes. It is mainly found in Asia and is very lethal.
眼镜王蛇，眼镜王蛇体长可达5.7米左右，有剧毒，是所有剧毒蛇中体型最长的一种，多见于亚洲且致死率很高。
The pit vipers are a large group of advanced venomous snakes that evolutionarily arose in china but spread to the new world across an ancient land bridge connecting northeastern siberia with alaska.
蝮亚科（pitvipers）起源于中国，是通过连接西伯利亚东北部与阿拉斯加的古陆桥而扩散到美洲的一大类高等的毒蛇。
What separates colubrids from other snakes we have been classifying as venomous, is not the lack of venom, but the lack of an effective way to deliver the venom into its prey.
将黄颌蛇与其他被我们归类为毒蛇的蛇区别开来的，并不是它们没有毒液，而是缺乏一种将毒液输送到猎物体内的有效方法。
Two snakes are talking. One of them turns to the other and asks, "Are we venomous?"
两条蛇在唠嗑，一条转过头问: "我们是有毒的吧？"
Smith is a leading researcher of poisonous and venomous fish, and says that, while snakes are more often associated with venom, there are far more poisonous species of fish.
史密斯是含毒素和毒液鱼类研究领域的领军人物。 他还说道，虽然人们往往把蛇与毒液联系在一起，但有毒鱼类的种类要远多于蛇类。
To discover how snakes manage it Jake Socha of Virginia Tech and his colleagues conducted a series of test flights with paradise tree snakes, a mildly venomous variety found in parts of Asia.
为了查明蛇类如何成功的飞行很远，维吉尼亚理工学院的JakeSocha和其同事用一些天堂树蛇做了一系列的飞行试验，这是一种毒性适中的蛇，它生长在亚洲部分地区。
To discover how snakes manage it Jake Socha of Virginia Tech and his colleagues conducted a series of test flights with paradise tree snakes, a mildly venomous variety found in parts of Asia.
为了查明蛇类如何成功的飞行很远，维吉尼亚理工学院的JakeSocha和其同事用一些天堂树蛇做了一系列的飞行试验，这是一种毒性适中的蛇，它生长在亚洲部分地区。
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