bɪkˈʌz hiː wʌz ɛkspˈiəɹɪənst ɪn ɹˈaɪɾɪŋ ænd nˈuː ðə lˈɔːz ʌv ˈʌðɚ sˈɛɾəld səsˈaɪəɾiz, jˈɛluː tʃˈuːkaɪ wʌz jˈuːsfəl tə ðɪ ˈɛmpaɪɚ.
Because he was experienced in writing and knew the laws of other settled societies, Yelü Chucai was useful to the Empire.