You have to drill into rocks much harder than those you normally encounter in oil fields.

你必须在岩石上打钻，而那些岩石比你通常在油田遇到的要硬得多。

youdao

Oil pools are valuable underground accumulations of oil, and oil fields are regions underlain by one or more oil pools.

油藏是珍贵的地下石油堆积物，而油田是由一个或多个油藏所组成的地下区域。

youdao

Licences to develop oil fields are being awarded at tortoise speed.

现在开发油田的许可证以龟速核发颁授。

youdao

In Pampa,the oil fields dried up.

VOA: special.2010.06.13

That's right. Louisiana Slim he's sometimes called. Yes, Sir. I sure have met Big Slim. And he used to work in the east Texas oil fields?"

对，人们有时叫他路易斯安那的细杆，是的先生我肯定,遇见过，他过去是不是经常在得克萨斯州东部的油田工作？“

耶鲁公开课 - 1945年后的美国小说课程节选

Donahue says lifting the embargo will give U.S.businesses significant opportunities to sell agricultural and manufactured goods to Cuba and to develop offshore oil fields.

VOA: standard.2009.05.06

After graduation, Sally went on to work in the oil fields of Oklahoma and Colorado.

WHITEHOUSE: President Obama Nominates Sally Jewell as Secretary of the Interior | The White House

Now, people living near the Inglewood oil fields are protesting PXP's plan to increase production.

NPR: Oil Expansion Plans In L.A. Rile Residents

Exxon's oil production slipped 1 percent as its oil fields experienced natural declines from peak production.

NPR: Exxon 1Q Earnings Rise But Production Slips Again