21st century

基本解释

But if we burn coal in the 21st century using 20th century technologies, our air will be foul and disruptions to our climate will threaten us all.
但是，如果我们在21世纪用20世纪的技术烧煤，我们的空气将被污染，我们的气候会被破坏，这将使所有人受到威胁。
All of these mechanisms will help us increase mutual understanding and trust, which will be crucial to advancing our relationship in the 21st century.
所有这些机制将帮助我们增进相互了解和信任，它们在推进我们在21世纪的关系上将是至关重要的。
We have entered the second decade of the 21st century.
我们已经进入了21世纪的第二个十年。

However,this country's largest group of stores, Wal-mart , will not be selling "21st Century Breakdown."
But the question is how are those of us of this generation, living that ethic out in the early 21st century?
但问题是,我们这代人如何，将在21世纪初的生活中体现这一道德？
普林斯顿公开课 - 人性课程节选
That is a remarkable endeavor and one that I think in the early 21st century which is too much defined by religious conflict should very much be held up and lived out.
这是巨大的努力,我认为这种努力也是,过多得被宗教冲突定义的21世纪初期,应该坚持并实现的努力。
普林斯顿公开课 - 人性课程节选

That talent and technology could undoubtedly help bring Apple and iCloud into the 21st century.
FORBES: Apple Does Suck at Web Services. Twitter and Yahoo Can Fix That.