换而言之

in other words

to exchange / to change (clothes etc) / to substitute / to switch / to convert (currency)

and / as well as / and so / but (not) / yet (not) / (indicates causal relation) / (indicates change of state) / (indicates contrast)

(typically preceded by 就…[jiu4 xx5] or 對…|对…[dui4 xx5] etc) as far as ... is concerned; speaking in terms of ...

words / speech / to say / to talk

(possessive particle, literary equivalent of 的[de5]) / him / her / it