然而在过去一年，我们发现一些大型的公司创建或修改在线内容，目的单纯是为了搜索引擎优化（SEO）。 实际上，这意味着这些内容对用户本身并不那么有用了。

However, in the past year we’ve seen some major businesses create or change content to drive pure SEO benefit which actually means the content isn’t as beneficial to users themselves.

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在过去的13年中，中国已从一个单纯的石油出口国变成世界第二大石油进口国，其40%的资源依靠国外进口。

Over the past 13 years, China has moved from being a net exporter of oil to become the world's second-biggest importer, relying on foreign sources for 40% of its demand.

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实际上，它极薄的外形正是过去它和iPhone之间的一大区别，而不是单纯的去除了手机无线电功能的iPhone而已。

In fact, its extremely thin shape is what has differentiated it from the iPhone in the past, as opposed to being just an iPhone without a cellular radio.

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That is to say, someone with sufficient political audacity to create their own authority, who has not simply received it from the past, but to create their own authority.

也就是说,他或她必是一位具有足够政治勇气,且能创造其自身威信的人，而非单纯只是接受过去的遗产，更是创造其自身的威信。

耶鲁公开课 - 政治哲学导论课程节选