世代交替

shìdàijiāotì
  1. (biology) alternation of generations
  2. (fig.) generational succession; passing of the torch from one generation to the next

CEDICT

biology

Entry Composition

1 世代 shìdài
  1. for many generations
  2. generation
  3. era
  4. age
2 交替 jiāotì
  1. to replace
  2. alternately; in turn