Chinese Conversation – lesson 626
人们曾经认为每个座头鲸群有着自己群体不变的基本曲调。但是最新的研究却发现鲸喜欢容易记住的旋律，而且会很快学唱它们听到的新歌。
It was thought that each population of humpbacks had its own song which remained constant but recent findings suggest that the whales appreciate a catchy tune and quickly adopt any new songs they hear.
(Source: wwenglish.com)