A hydrocarbon deposit, such as petroleum, coal, or natural gas, derived from living matter of a previous geologic time and used for fuel.

碳氢化合物的沉淀，如石油、煤、天然气等，由古代生物衍生而成，经过开发后用作燃料。

youdao

In 1971, geologists discovered a massive underground deposit of natural gas on this site.

在1971年，地质学家在地面上发现在厚厚的地底下存在着天然气。

youdao

This is the result of improved technology and better knowledge of the enormous potential of such natural gas deposits as the Marcellus Shale in New York and Pennsylvania, and the Eagle Ford deposit in Texas.

FORBES: U.S. Energy Independence in 15 Years?