任意契约

【法】 contract at discretion

任意的英语翻译：

arbitrariness; at discretion; at will; random; voluntariness
【医】 ad lib.; ad libitum; random

契约的英语翻译：

bargaining; bond; contract; covenant; deed; indent; indenture; obligation
pact; stipulation
【经】 agreement; agreements; bargain; compact; contract; deed; indenture
instrument; title deed