It includes data from over 50,000 oil, gas, and coal fields in 89 countries.

该数据库收集89个国家5万多个石油、天然气和煤田的数据。

It owned its own coal-fields and iron mines and its own forests, and it produces most of the implements used by 10,000,000 farmers.

有自己的煤田和铁矿以及自己的森林，生产 1000 万农民使用的大部农具。

With his early profits he purchased more coal lands until, by 1889, he owned ten thousand coke ovens and was the undisputed " coke king" of Connellsville.

凭借早期的利润，他购买更多的煤田，直到 1889 年，他有万个焦炉，成为康奈尔斯维尔无可争议的“焦炭王”。

Thus were formed those immense coalfields, which nevertheless, are not inexhaustible, and which three centuries at the present accelerated rate of consumption will exhaust unless the industrial world will devise a remedy.

这样就形成那些巨大的煤田，然而，这些煤田并不是取之不尽用之不竭的，而且按照目前加速的消费速度， 三个世纪之后， 除非工业世界能够想出补救办法， 否则这些煤田将会耗尽。