換言之

换言之
huànyánzhī
in other words

CEDICT

Entry Composition

1 換 huàn
  1. to exchange
  2. to change (clothes etc)
  3. to substitute
  4. to switch
  5. to convert (currency)
2 言 yán
  1. words
  2. speech
  3. to say
  4. to talk
3 之 zhī
  1. (possessive particle, literary equivalent of 的 de)
  2. him
  3. her
  4. it