And gemmules can survive just about anything.

gemmules 几乎可以在任何情况下存活。

And their gemmules can survive environments that don't have any oxygen at all.

他们的宝石可以在完全没有氧气的环境中生存。

Sponges can reproduce both sexually and asexually – and when they take the asexual route, usually in harsh conditions, they produce a tiny bundle of embryonic cells called a gemmule.

海绵可以进行有性繁殖和无性繁殖——当它们采取无性繁殖方式时，通常是在恶劣的条件下， 它们会产生一小束称为胚珠的胚胎细胞。