1. Snakes did not acquire their poison for use against man
    因为蛇有毒液不是用来对付人的，

2. Poison to a snake is merely a luxury;
    毒液对毒蛇来说只不过是一种舒适生存的优越手段，

3. Poison makes people sick; some poisons kill people as well as birds and animals.
    毒物会使人生病；有些毒物不但会毒死鸟和动物，还会毒死人。

4. Some snakes manufactured a poison different in every respect from that of others,
    有些蛇产生的毒液也在各方面与另外一些毒蛇产生的毒液不同，

5. Carbon monoxide is a poison.
    一氧化碳是有毒气体。

6. But by far the more unpleasant is the blood poison.
    但溶血性毒液尤其厉害。

7. One wonders also why Nature, with some snakes, concocted poison of such extreme potency.
    人们弄不清楚大自然为什么在某些蛇的身上调制出如此高效的毒液来。

8. One poison acts on the nerves, the other on the blood.
    一种毒液作用于神经，另一种毒液作用于血液。

9. They could have caught and lived on prey without using poison,
    它们也可以不用毒液捕捉动物而生存，

10. That the blood poison is, so to speak, a newer product from an improved formula.
    而溶血性毒液，打个比方说，是根据改良配方生产的一种较新的产品。