在二十一世纪，那些观念陈旧的人将落后于时代。

In the 21st century, those people old ideas will the times.

动漫产业作为一个绿色产业在二十一世纪发展迅速。

Animation industry which is regarded as a green industry is developing rapidly in the twenty-first century.

这些知识将有助于增强科学家在二十一世纪的气候预测。

That knowledge will help sharpen climate projections in the 21st century.

在二十一世纪纳米科技是三大重要技术之一，属于前沿性课题之一。

Nanotechnology in the twenty-first century technology is one of the three most important are the forefront of one of the topics.

但在二十一世纪，“you”（你）和“i”（我）却是相当有影响力的两个小词。

But in the world of the 21st century, “you” and “i” are two very potent little words.

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。

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

关于中国传统音乐在二十一世纪的发展与走向，音乐学界曾有多种讨论，各抒己见，莫衷一是。

At present, there is a great number of ideas on the development of Chinese traditional music in the field of Musicology .

在二十一世纪，也许囚禁这么庞大、复杂、有智慧的食肉动物作为人类的娱乐是逐渐不会再被大众所接受了。

The idea of keeping captive such a large, complex, intelligent predator for our entertainment may no longer be acceptable in the 21st century.

会展策划人必须迅速而准确地利用这一不断更新的技术，以保证在二十一世纪的会展竞争中永远立于不败之地。

Meeting organizers must use this dynamic technology quickly and accurately to ensure that their event remains competitive throughout the twenty-first century.