useless species

常见例句

Often those species that can be most easily bred are the most useless in reclamation .
往往最容易培养的种类在改良土壤中最无用。
translation-dictionary.net
Sometimes useless features stick around in a species simply because they’re not doing much harm.
有时人们不会去改掉一些没有用的特点，只因为它们并没有什么坏处。
Such extravagant plumage would have been virtually useless for insulation or flying, but it might have attracted mates or allowed individuals of the species to recognize one another.
如此华而不实的羽毛对于保温或飞行来说显然是毫无用处，但却有助于吸引异性或分辨同类。

All the inspiration in the world is useless if the environment is destroyed by our species.
FORBES: Richard Branson: The One Skill Leaders Need to Learn