至今唯一开发的自然资源就是石油，南方的石油储量巨大（探明储量是67亿桶，是沙特的四十分之一）。

The only natural resource tapped thus far is oil, of which the south has quite a bit (6.7 billion barrels in proven reserves, or a 40th of Saudi Arabia’s pool).

youdao

至今唯一开发的自然资源就是石油，南方的石油储量巨大（探明储量是67亿桶，是沙特的四十分之一）。

The only natural resource tapped thus far is oil, of which the south has quite a bit (6.7 billion barrels in proven reserves, or a 40th of Saudi Arabia's pool).

youdao

一个世纪是相当长的一段时间，但是在四千多年的中国历史里，却只是短暂的一个片段，几乎不到四十分之一。

A century is a long time, but of China's more than four thousand years of history it is but a small fraction, less than one fortieth.

youdao