unveil本文中翻译为“宣布”，非常适合
U.S. voters mark the November election ballots for two people running together on a political party's White House ticket: one for president, the other for vice president.美国选民将11月的选举看作是一个政党中两人合作为其党派争取白宫的入门票，一个的目标是总统，另一个则是副总统。
【comment】这句翻译难点 1 mark这个动词【留待以后遇见，更熟悉它的用法和含义】 2 对on的翻译，或者说增词“争取” 3增词“的目标”
Tradition holds按照惯例
Along with having voter appeal, the vice president also needs to know well the levers of power in the federal government.
【comment】这句的技巧是将名词性的appeal（吸引力）翻译成动词
chose，picked-用词的多样化，翻译成汉语时也一样”挑选“”选择“”任命“
