也就是

yějiùshì
in other words; i.e.

CEDICT

Entry Composition

1 也 yě
  1. also; too; as well; (not ...) either
  2. (used after a verbal or nominal expression X to indicate that X is an extreme or unexpected case) even (X)
  3. (literary) particle having functions similar to 啊 a
2 就是 jiùshì
  1. exactly; precisely
  2. only; simply; just
  3. (used correlatively with 也 yě) even; even if