But how were cane toads gifted with those traits in the first place?

但是甘蔗蟾蜍究竟是如何获得那些特性的？

youdao

Cane toads can easily be caught in simple traps and can even be captured by hand.

简单的陷阱就可以抓到蔗蜍，甚至徒手都可以抓到。

youdao

The virus will control the population of cane toads by preventing them from maturing and reproducing.

这种病毒通过阻碍蔗蜍的蔗蜍的成熟和繁殖实现控制其数量的目的。

youdao

"The Chinese have been using cane toads with their skins,etcetera, in traditional medicines for many,many years now.

VOA: standard.2010.02.07

As many as 200 million cane toads in Australia pose a threat to native wildlife.

VOA: standard.2010.02.07

Though many invasive aliens are notorious for the harm they bring (pythons in Florida, cane toads in Australia, brown tree snakes in Guam), many others enhance the local nature scene.

WSJ: Ecology and Change: Nature Has No 'Balance' for Us to Keep | Mind & Matter