If we could extract that crude, accurately termed "shale oil" it would amount to a huge resource.

如果我们能够开采出这类准确的说法叫做“页岩油”的原油，那将是一项庞大的自然资源。

youdao

Instead it will generate steam to extract crude from a Chevron oil field.

FORBES: Chevron Taps The Sun To Extract Crude From California

The plan: extract 1.5 million gallons of green crude oil a year from patented pond scum fed a diet of carbon dioxide and sunlight.

FORBES: The U.S. Military's Great Green Gamble Spurs Biofuel Startups

The solar steam is being injected into wells to make it easier to extract heavy crude from a 120-year-old oil field in the Central Valley town of Coalinga.

FORBES: Chevron Taps The Sun To Extract Crude From California