Intrastate milk competes with interstate milk, and thus the price of intrastate milk has an impact on the price of the interstate milk, thereby affecting interstate commerce.

• 州内的牛奶与州外的牛奶进行竞争，这样，一州内的价格便会对其它州牛奶的价格造成影响，并由此影响到州与州之间的贸易。