燃烧的硫磺会产生有毒烟雾。
有毒的矿物质首先被根部吸收，然后转移到茎和叶上。
Toxic minerals would first be absorbed by roots but later relocated to the stem and leaves.
由于它们缺乏氧气，沼泽沉积物中的硫化物含量很高，而硫化物对大多数植物都有毒。
Because they lack oxygen, marsh sediments are high in sulfides that are toxic to most plants.
这种援助对于查明潜在危险——有毒物种、不可预测的河流、未知领域——至关重要，那些危险可能意味着生死之差。
Such assistance was essential in identifying potential dangers—poisonous species, unpredictable rivers, uncharted territories—which could mean the difference between life and death.
其他哺乳动物如鸭嘴兽和一些鼩鼱是有毒的，这意味着它们会在体内产生一种毒素。
Other mammals, such as the platypus and some shrews, are venomous, meaning they produce a toxin internally .
这项研究包括了一些有毒的蜥蜴。
一些有毒物质流入我们作为饮用水的河流中。
Some poisonous substances are flowing into the rivers that are sources of our drinking water.
一定剂量的苯丙胺是确证对动物有毒的，因此不能用于人类。
It has proved toxic at some doses in animals and so cannot be used in humans.
此外，地热加热的水可能含有从热岩石中溶解出来的盐和有毒物质。
In addition, water heated geothermally can contain salts and toxic materials dissolved from the hot rock.
我们都听说过伞菌并且知道它们都是有毒的，但是很多人并不知道伞菌也是蘑菇的一种。
We have all heard of toadstools and know that they are poisonous, but what many people don't know is that a toadstool is actually a mushroom.
我们可以把西部平原上覆盖的大片草地撕开，然后把有毒的化学物质倒入土壤中，直到土壤枯死，被风吹走。
We can tear apart the great grass cover of the western plains and pour toxic chemicals into the soil until the soil is dead and blows away in the wind.
浓密的数据烟雾将不会有所缓解，一些研究者担心这些数据烟雾可能是有毒的。
There will be little respite from the dense data smog, which some researchers fear may be poisonous.
收割下来的枝叶会将有毒的化合物转移到远离这片区域的地方，它们将被焚烧或者用作堆肥，回收金属物质用于工业用途。
A harvest of the shoots would remove the toxic compounds off site to be burned or composted to recover the metal for industrial uses.
海洋成了各种有毒工业废料的大容器。
The seas have been used as a receptacle for a range of industrial toxins.
我们的汽车每年排放出成千上万吨的有毒尾气。
Our cars pump out thousands of tonnes of poisonous fumes every year.
绝对没有确保香烟不含有毒物质的规定。
There's absolutely no regulation of cigarettes to make sure that they don't include poisonous substances.
重工业排放的有毒化学物质污染着我们的河流。
臭鼬，一种由发酵粉和酵母等无毒成分混合而成的有毒液体，从高压水枪喷到抗议者身上。
Skunk, a noxious liquid mixture of nontoxic ingredients including baking powder and yeast, is blasted onto protesters from a water cannon.
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？
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?
狗舌草含有大量有毒且适应力强的生物碱：即使是用它的花制成的蜂蜜也含有稀释后的毒素。
Ragwort contains a battery of toxic and resilient alkaloids: even honey made from its flowers contains the poison in dilute form.
这个苹果被做成一边是好的，而另一边是有毒的。
Now the apple was so made up that one side was good, though the other side was poisoned.
来自海豹死亡海域的海水样本确实含有异常高浓度的有毒细菌。
Seawater samples from the area where the seals died did contain unusually high concentrations of the toxic bacterium.
整个植物，也被称为芸豆树，是有毒的，尽管有人说它的花无毒。
The entire plant, also known as a kidney bean tree, is toxic, though some say the flowers are not.
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。
Ok, venomous snakes are the ones that secrete poisonous substances or venom, like the snakes of the viper family or cobras.
环保人士和地方政府越来越关注于旧电子设备带来的有毒危害以及安全回收这些产品的成本。
Environmentalists and local governments are increasingly concerned about the toxic hazard posed by old electronic devices and the cost of safely recycling those products.
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。
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.
她发现，许多家庭都暴露在高水平的、有时是致命的化学物质和其他有毒物质中，但她不被允许公开自己的信息。
She found many families were being exposed to high, sometimes deadly, levels of chemicals and other toxic substances, but she was not allowed to make her information public.
这些有毒物质会限制毛毛虫的生长，减少雌蛾产卵的数量。
These noxious substances limit caterpillars' growth and reduce the number of eggs that female moths lay.
它们能在含有对大多数其他植物有毒的高浓度金属的土壤中茁壮成长。
They can thrive in soil with high concentrations of metals that are toxic to most other plants.
你通过鞋子带进家里的灰尘和有毒化学物质会使家里的空气质量恶化。
The dust and toxic chemicals you bring into your house via your shoes can deteriorate the air quality in your home.
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