During the twentieth century, it became a world language.

在二十世纪，它成为了一种世界语言。

Lao She is one of the greatest Chinese writers of the twentieth century.

老舍是二十世纪最伟大的中国作家之一。

The art styles of the twentieth century were diverse.

二十世纪的艺术风格多样化。

The twentieth century witnessed many technological advances.

二十世纪见证了许多科技进步。

In the early twentieth century, cars began to become common.

二十世纪初期，汽车开始普及。

The twentieth century saw many technological advancements.

第二十世纪见证了许多技术进步。

The music of the twentieth century still has an impact today.

二十世纪的音乐影响至今仍然存在。

The wars of the twentieth century changed the face of the world.

二十世纪的战争改变了世界的面貌。

It has been famous for its theaters since the early twentieth century.

自二十世纪初以来，它就以剧院而闻名。

The late twentieth century witnessed the rapid development of China's economy.

二十世纪末是中国经济快速发展的时期。