/ˌi:vəˈlu:ʃn;ˌev-; US ˌev- ||; ˌɛvəˈluʃən/noun
[U]:
1 the development of plants, animals, etc over many thousands of years from simple early forms to more advanced ones (生物的)进化:
Darwin's theory of evolution达尔文的进化论
2 the gradual process of change and development of sth 演变;发展:
Political evolution is a slow process.政治变革是一个缓慢的过程。