If the medieval lex mercatoria laid the foundations, its is the central courts, particularly from the eighteenth century onwards, that have fashioned the body of principles and rules making up modern English commercial law.

• 参考译文：如果中世纪的商人法奠定了基础，那么就是由中央法院，由其从18世纪以来，培育了英国现代商法的众多的规则和原则。