层出不穷

層出不窮
céngchūbùqióng
  1. more and more emerge
  2. innumerable succession
  3. breeding like flies (idiom)

CEDICT

Entry Composition

1 层 céng
  1. to pile on top of one another
  2. layer; stratum
  3. floor (of a building); story
  4. (math.) sheaf
  5. classifier for layers
=2 出 chū
  1. to go out; to come out
  2. to arise; to occur
  3. to produce; to yield
  4. to go beyond; to exceed
  5. (used after a verb to indicate an outward direction or a positive result)
  6. classifier for dramas, plays, operas etc
=2 出 chū variant of 出 chū (classifier for plays or chapters of classical novels)
3 不穷 bùqióng
  1. endless
  2. boundless
  3. inexhaustible