invertebrate

无脊椎动物

Insects, worms, and jellyfish are all invertebrates.

昆虫、蠕虫和水母都是无脊椎动物。

无脊椎的

The museum has a huge collection of invertebrate fossils.

这间博物馆收藏了大量无脊椎动物化石。

没骨气的、懦弱的贬义

He was too invertebrate to stand up to his boss.

他太没骨气，不敢跟老板据理力争。