每逢谈到美国的言论自由,人们总要提到美国宪法的第一补充条款。法官布莱克说:“根据宪法,联邦政府没有任何权力对任何类型的言论和任何形式的思想表达施加任何压力。”但另一名法官道格拉斯却持不同看法,他说:“第一补充条款并没说只有在言论不存在危险的时候才有表达自由,没说只有在言论不存在颠覆的倾向时才有表达自由……政府所有的规定和限制的意图在条款里都没讲,只是模棱两可地说议会将不制定任何法律……” Whenever talking about freedom of speech in the United States, people always have to refer to the first supplement to the U.S. constitution. Judge Blake said: “According to the Constitution, the federal government has no power to exert any pressure on any type of speech and any form of expression.” But another judge, Douglas, took a different view: “The first supplement did not Said that freedom of expression was expressed only when there was no danger of speech and did not say that freedom of expression was expressed only when there was no tendency for subversive speech ... The intention of government-imposed rules and restrictions was not stated in the clause, but only ambiguously Parliament will not make any laws ... ”