The race had turned into a grudge match between the two teams.这场速度比赛成了两队之间势不两立的一场比赛。There is a most inveterate, implacable enmity between them.他们势不两立，有不共戴天之仇。They had always been bitter rivals.他们一直是势不两立的竞争对手。The two sides are irreconcilably opposed.双方势不两立。