Among the wide and narrow definitions of contract law, Balers tries to put forward a definition which is moderate: contract law is a kind of law concerning about trade relations which is profitable and expected. 在狭窄和宽泛的契约法定义中,贝勒斯试图提出一个较为适中的契约法概念,即契约法是关涉相互期待的正值交易关系的法律。