比赛规则：

1. 将发布的英文原文译为中文，点击“作业卡”提交译文。

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4. 下周一（2019年2月18日）16点截止参赛，周四公布编辑部筛选出的优秀译文接受读者投票，周六截止投票。

5. 点评专家将结合读者投票选出本期擂台的优胜译文，周日微信公众号公布结果，《英语世界》2019年第4期将登载本期擂台赛果及点评文。

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7. 比赛未尽事宜概以本刊最终解释为准。

比赛原文：

Parties and Presidency (I)

Why does the American presidency alternate between Republicans and Democrats? It's not a requirement but it does seem that way. Technically, any party can win a presidential election, but American politics favor a two party system. Although the Founding Fathers made no mention of parties in the constitution – and in fact argued against the idea in The Federalist Papers, (they called them “factions”) – parties emerged almost immediately in the young republic. Since then, the Republicans and Democrats have become the two major parties and used their power to make a third party winning the White House highly unlikely. The country doesn’t like one party in power too long and when that party isn’t cutting it, they run to the other party.