Many doctors feel that this is a problem in the twenty-first century.

许多医生认为这是21世纪的一个问题。

youdao

The task facing medicine in the twenty-first century will be to redefine its limits even as it extends its capacities.

21世纪医学面临的任务将是重新定义其限制，即使它扩大了其能力。

youdao

Geothermal energy probably will not make large-scale contributions to the world energy budget until well into the twenty-first century, if ever.

如果可能的话，进入了21世纪之后，地热能才会对世界的能量预算做出大规模的贡献。

youdao

Professor Burgess says the first ten years of the twenty-first century are expected to register the most attacks of any ten-year period.

VOA: special.2009.06.16

All of this is Darwinian thinking and, I think, increasingly will be central in importance in the twenty-first century.

这就是达尔文所思考的，我认为，这在二十一世纪会越来越重要。

耶鲁公开课 - 文学理论导论课程节选

What is it about the Greeks between the years that I mentioned to you that deserves the attention of people in the twenty-first century?

是什么使得久远的古希腊,会值得21世纪的人们,去关注和研究呢

耶鲁公开课 - 古希腊历史简介课程节选

By the first decade of the twenty-first century, I could no longer swing a golf club.

NPR: Excerpt: 'The Healing Of America'

The second decade of the twenty-first century will be the decade of the brain.

FORBES: Can Science Eliminate Disease?

But, by the dawn of the twenty-first century, Wall Street salaries were nearly twice as high.

FORBES: Occupy Wall Streeters Should Be Livid About Losing The Gold Standard