刺猬是一种小型带刺的哺乳动物。

Hedgehogs are small ___spiny mammals.

这种植物的茎上有许多刺，很容易扎到手。

The stem of this plant is heavily ___spined and can easily prick your fingers.

尽管面临巨大压力，他依然给出了充满激情的回答。

Despite immense pressure, he gave a ___spirited reply.