And one thing that researchers are finding especially interesting is the speed with which they're doing this- we're not talking about gradual evolution here -- these animals are changing fast.
研究者发现一件特别有趣的事情，那就是它们适应的速度——我们指的并不是逐渐的进化--这些动物进化的非常快。
Gradual evolution
原声例句
剑桥雅思听力全真试题 13
物种起源
Everyone who believes in slow and gradual evolution, will of course admit that specific changes may have been as abrupt and as great as any single variation which we meet with under nature, or even under domestication.
每个相信缓慢和渐进进化的人，当然会承认， 特定的变化可能与我们在自然界甚至驯化下遇到的任何单一变异一样突然和巨大。
英语百科
Anagenesis
（重定向自Gradual evolution）
![The species Bufo periglenes (Golden Toad) was last reported in 1989](/Images/godic/202501/16/Bufo_periglenes2_cropped1321.jpg")
Anagenesis, also known as "phyletic transformation", is when the new morphospecies is a result of rapid evolution in the ancestral form without speciation taking place, such that there are no remaining other populations of the ancestor species and the species can be considered extinct. The ancestor species is therefore superseded by the new species it morphs into. Anagenesis is in contrast to the branching speciation known as cladogenesis. Anagenesis rejects animals related by convergent evolution and unlike the study of behavioral homologies permits the inclusion of animals related by parallel evolution (Yarczower & Hazlett 1977).
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