I think one of the other complicating factors is that in the United States we have the most established set of transportation design guidelines compared to other countries.

我认为另一个复杂的因素是，与其他国家相比，美国拥有最完善的一套交通设计指南。

When I asked Geoffrey Cannon, a British researcher who helped design the Brazilian nutrition guidelines, why Brazilian food policy is so much more ambitious than that in England, he pointed to the prevailing food culture.

当我问帮助设计巴西营养指南的英国研究员杰弗里-坎农（Geoffrey Cannon），为什么巴西的食品政策比英国的要雄心勃勃得多时，他指出原因是当地主流的饮食文化。