It has now reached a point where a growing number of people believe that it is far too high, and that bringing it down will be one of the great challenges of the twenty first century.

现在，到了越来越多人认为它太高了的程度，而且使它降低将是21世纪最大的挑战之一。

It is the twenty-first Football World Cup.

这是第二十一届足球世界杯。

Seventeen civilians were hurt. Most are students who had been attending a twenty-first birthday party.

17名平民受了伤，其中大多数是参加一个21岁生日聚会的学生。

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。

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。

Russia is holding the twenty-first FIFA WORLD CUP now.

俄罗斯正在举办第21届世界杯。

They are celebrating their daughter's twenty-first birthday in the Garden Hotel.

他们正在花园酒店为女儿庆祝21岁生日。

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。

Which country do you think will win the first prize of the twenty-first FIFA World Cup?

你认为哪个国家会赢得第21届国际足联世界杯的冠军？

At the beginning of the twenty-first century, he could note that UNESCO had joined him in this conviction.

在二十一世纪之初，他注意到联合国教科文组织已经同他一道对此深信不疑。

When her hair is shorn so that her forehead may be branded, she will cry your twenty-first century tears.

她的头发被剃掉后额头上就会露出烙印来，她将令你这个二十一世纪的人为她流泪。

They are doing this in the context of defining and confronting major underlying causes of ill-health in the twenty-first century.

他们在这样做的同时，还确定并对付二十一世纪中健康不良的主要根源。

The capacity to respond to health threats quickly with well-coordinated action is indispensable for public health in the twenty-first century.

在二十一世纪中，以协调良好的行动迅速应对卫生威胁的能力对于公共卫生是必不可少的。

The answers, my friends, will be blowing through and creating the winds of the twenty-first century.

我的朋友，这些问题的答案将主导二十一世纪的风向，并将贯穿整个世纪。

The explosion in urban population looks set to continue through the twenty-first century, presenting challenges and opportunities for scientists.

城市人口在二十一世纪持续激增似乎已成定局，这给科学家们带来了更多的挑战和机遇。

Of the millions who sawHaley’s comet in 1986, how many people will live long enough to see itreturn in the twenty-first century.

1986年看见哈雷慧星的千百万人当中，有多少人能够长寿到足以目睹它在二十一世纪的回归呢？

In the fast-paced twenty-first century, managers in software project organizations are faced with complex, often intractable, project investment decisions.

在快速前进的二十一世纪，软件项目企业中的管理人员面临着复杂的，经常难处理的项目投资决策。

'Twenty-First Century'. In this condition participants were asked about a piece of music that meant a great deal to them.

“二十三世纪”：在这一环节参与者被问及对他们有重要意义的一段音乐。

When I had asked her about hers, and she had told me it was the twenty-first of October, she hadn't asked me when mine was.

我问她的生日是什么时候时，她告诉过我是在十月二十一日，她没有问我的生日。

Warm waters passing through the strait into the Arctic Ocean might have helped reduce sea ice extent since the turn of the twenty-first century.

自从新世纪开始，通过白令海峡进入北冰洋的温暖海水，已经开始限制海冰的范围。

This wall of garbage orbiting us all seems like a symbol of the great dilemmas facing humanity in the twenty-first century.

这堵围着我们转的垃圾墙好似一个象征，它象征了21世纪的人类所面临的巨大的两难困境。

The development of such a telescope will be one of the great astronomical projects of the twenty-first century.

而开发这样一台望远镜将会是21世纪天文学的一个重要的研究课题。

We had built and crossed our bridge to the twenty-first century, and were not going back.

我们已经建立并跨过了通往21世纪的桥梁，并且，我们不会走回头路。

I have no doubt that America can compete-and succeed-in the twenty-first century.

毋庸置疑，我认为美国有实力参与21世纪的竞争并取得成功。

The graph below the images tracks the surface elevation of Devils Lake from the late nineteenth through the early twenty-first centuries.

图像下面的图表记录了魔鬼湖在19世纪末到21世纪初的水面高度的变化轨迹。