我们在露营时发现了一条盘踞在岩石上的铜头蛇。

We spotted a ___copperhead coiled on a rock during our camping trip.

在南北战争期间，一些北方人秘密支持南方，被称为铜头蛇。

During the Civil War, some northerners secretly supported the South and were called ___Copperheads.