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

该数据库收集了89个国家5万多个、然气煤田的数据。

But the Durham coal owners had a wider problem in that a lot of the best coal fields in Durham were quite well inland, in the area around Bishop Auckland.

但达勒姆的煤主们面临着一个更大的问题， 即达勒姆的许多质煤田都位于内陆地区，就在主教艾尔沃思镇周边。

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.

它拥有自己的煤田以及自己的森林，它生产了 1000 万农民使用的大部分农具。

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，他购买了更多的煤田，直到 1889 年，他拥有了一万个焦炉，成为康奈尔斯维尔无可争议的“焦炭王”。