当然，所有毒素都是达到了一定剂量的，就像少量的毒物并不会伤身，吃入或喝入的毒越多，危险就越大。

Of course all toxins have doses, and just as a tiny bit of poison won't necessarily harm you, the more you eat or drink, the greater the danger.

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从一位化学家角度来看，许多有机化合物如二恶英和肉毒毒素都是有毒物质，而像氯化钠和锂等无机化合物则是无害甚至有益的。

For a chemist, many organic compounds like dioxin and botulism toxin are extremely toxic, while inorganic compounds like sodium chloride or lithium are harmless or even beneficial.

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毫无节制地将毒气、毒烟和有毒物质排放到空气和河流中引发了许多环境和社会问题。

Unlicensed emission of toxic gases, fumes and discharge into air and rivers has caused a great deal of environmental and social problems.

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