The insects with the spraying butts are fittingly named bombardier beetles.

投弹手甲虫。

Bombardier beetles use the first approach.

庞巴迪甲虫使用第一种方法。

Darwin’s assailant was the bombardier beetle.

攻击达尔文的是庞巴迪甲虫。

The bombardier beetle is no exception: the toads that swallow them can tolerate the caustic spray that Darwin found so distasteful.

庞巴迪甲虫也不例外：吞下它们的蟾蜍可以忍受达尔文认为如此令人反感的腐蚀性喷雾。