它们的繁殖很慢，近五年才生育一次。

They breed very slowly, they breed once throughout about five years.

youdao

我们本以为刺背鳄蜥应该进化得很慢，就像它们做什么事都很慢一样——长得慢，繁殖慢，新陈代谢也慢。

Of course we would have expected that the tuatara, which does everything slowly — they grow slowly, reproduce slowly and have a very slow metabolism — would have evolved slowly.

youdao