| 1. | In the past itinerant merchants sold harmful products .
过去，流动的商人出售有毒的产品。 |
| 2. | The factory does not give off any poisonous exhaust gases .
这家工厂并不放出任何有毒的废气。 |
| 3. | Many species have poisonous or hallucinogenic compounds .
许多种豆科有有毒的或引起幻觉的化合物。 |
| 4. | If plastic and rubber are burnt , they 'll give off poisonous gases .
塑料和橡胶燃烧，就会放出有毒的气体。 |
| 5. | The vapour of the chlorine and iodo compounds in particular, can be toxic .
氯和碘的化合物的蒸气是有毒的。 |
| 6. | He would not, at any rate, listen to those subtle poisonous theories .
他无论如何再不去听那些玄妙有毒的理论。 |
| 7. | Arsine is a colorless, poisonous gas that requires careful handling .
胂是一种无色的有毒的气体需要小心地对待。 |
| 8. | He had heard that the liquor made in the jungle stills was often poisonous .
他听说丛林酒场里酿出来的酒常常是有毒的。 |
| 9. | Many of these products are toxic to animals and other plants, or at least repellent .
这些产物的大多数对于动物和其它植物是有毒的，或者至少是有驱避作用的。 |
| 10. | Scientists do not yet know precisely how insects can produce their toxic defensive chemicals without poisoning themselves .
目前，科学家们尚未十分了解昆虫是怎样做到生产有毒的自卫化学物质而不伤及自身。 |
