Perhaps the nastiest of them all was an assassin bug.

其中最可怕的是一种猎蝽。

What the most surprising is that certain assassin bugs still use this tactic today.

最让人称奇的是有些特定的猎蝽现在还在使用这一战术。

One suspects it took the assassin bug millions of years to recognize that odor.

有人怀疑猎蝽经过了数千万年才能辨识这种气味。

But the latest venom science is turning to new sources of venom: centipedes, assassin bugs, and stealthy cone snails.

但最新的毒液科学正在转向新的毒液来源：蜈蚣、刺客虫和隐身锥蜗牛。

And, why do some animals, like the assassin bug, evolve two venoms--one for defending itself and one for killing its prey?

而且，为什么有些动物， 比如刺客虫，会进化出两种毒液——一种用于自卫， 另一种用于杀死猎物？