In the 20th century, the first four notes were used by other musicians to make different types of music like hiphop and rock and roll.

在20世纪，其他音乐家会使用前四个音符创作不同类型的音乐，如说唱乐和摇滚乐。

In the 20th century, airplanes replaced trains for long distance travel.

在20世纪，飞机代替了火车进行长途旅行。

In the 20th century the main threat to international security was superpower conflict; today it is failing states.

20世纪，国际安全的主要威胁是超级大国之间的冲突，而如今的主要威胁是国家的衰落。

In the 20th century, first it was the movies, then radio, then television that seemed to spell doom for the written world.

在20世纪，先是电影，然后是收音机，再然后是电视机，似乎都给书面世界带来了灭顶之灾。

Elves, goblins, and trolls seem to be the timeless creations of the distant past, but gremlins were born in the 20th century.

精灵、小妖精和侏儒似乎是远古时代永恒的产物，但小妖精诞生于20世纪。

Carson Maulers is a wunderkind in the 20th century of American literary history.

卡森·麦卡勒斯是二十世纪美国文学史上一位神童。

Associate professor yu xiuying's research achievements have formed a feature in the 20th century parleyvoo.

于秀英副教授的研究成果在20世纪法国语言学流派方面已经形成特色。

It was tried in the 20th century.

它开始试验于20世纪。

Tobacco caused 100 million deaths in the 20th century.

二十世纪中烟草导致了1亿人死亡。

In the 20th century, dogs' duties became more diverse.

在二十世纪，军犬的职责更为多样化。

And only in the 20th century it was thoroughly restored.

20世纪，大教堂进行了全面的重建。

What we now call conditioner appeared in the 20th century.

我们现在使用的护发素是在20世纪面世的。

It remained in widespread use until late in the 20th century.

在20世纪末之前，它仍然广泛使用。

Media in the 20th century was run as a single race — consumption.

媒体在20世纪的运作方式是单一的—仅仅是观看。

In the 20th century oil replaced coal as the cheap fuel of choice.

20世纪后，石油代替煤炭成为廉价燃料的选择。

In the 20th century, "dude" evolved to take on a more neutral meaning.

20世纪时，“Dude”的含义逐渐变得为中性。

In the 20th century petroleum became the most important source of energy.

二十世纪，石油成为最重要的能源。

This trend accelerated with the advent of radio and television in the 20th century.

这一趋势加速了20世纪广播和电视的出现。

In the 20th century, it was harder to create change from outside an institutional power.

20世纪时，在组织之外很难创造出变革。

In the 20th century, European nations (including Russia) managed 16 defaults between them.

20世纪，欧洲国家(包括俄罗斯)中有16个不履行债务的国家。

Patrick Nagel's hard-edge style of 80's women became one of the strongest images in the 20th century.

派特克•纳哥尔的锋刃派风格的80年代妇女成了20世纪最具说明力的形象之一。

The most powerful hurricane to hit the us in the 20th century, Andrew touched down in August of 1992.

这场飓风发生在1992年八月，是20世纪美国威力最强的飓风。

We listen to music in the 21st century in a profoundly different way than we did in the 20th century.

在21世纪，我们听音乐的方式与20世纪相比已有天壤之别。