NISI ALIUD CONVENERIT

NISI ALIUD CONVENERIT nisi aliud convenerit (nI-sIay-lee-[schwa]d k[schwa]n-ven-[schwa]r-it). [Latin] Hist. Unless it has been otherwise agreed; unless something else has been agreed to. How to translate the legal term NISI ALIUD CONVENERIT in Chinese?