By shaking hands, gesturing and repeating signature lines, presidential candidates amplify their message to the wider world, says Stephen Farnsworth, director of the Center for Leadership and Media Studies at the University of Mary Washington.

通过握手、做手势和重复标志性的台词，总统候选人可以向更广泛的世界传播他们的信息，玛丽华盛顿大学领导力与媒体研究中心主任斯蒂芬·法恩斯沃斯说。