也就是說

也就是说
yějiùshìshuō
  1. in other words
  2. that is to say
  3. so
  4. thus

CEDICT

Entry Composition

1 也就是 yějiùshì in other words; i.e.
2 說 shuō
  1. to speak; to talk; to say
  2. to explain; to comment
  3. to scold; to tell off
  4. (bound form) theory; doctrine