In order to solve problems of reuse difficulty and low management efficiency of resource base system, a resource-base system model was proposed based on hierarchy semantics network.

为了解决资源库系统内容重用难及管理效率低的问题，采用分层语义网络结构提出了一种提高资源关联性及利用率的资源库系统模型。

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And over the next 30 years an additional 2 billion people will need food — yet the natural resource base on which agriculture depends is growing increasingly fragile.

而且今后30年里，需要食物的人数要增加20亿—然而农业所依赖的自然资源基础正在变得日益脆弱。

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So they certainly have the resource base to relieve the pressure.

他们肯定有这样的资源来减轻投入上的压力。

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Considering the huge natural-gas resource base in North America, the EIA has projected the U.S. to become net exporter of natural gas by 2022, helped by unlocking of the shale natural gas reserves in the country.

FORBES: For Frackin' In The Bakken You Gotta Go With American Eagle

"There's a lot of people who don't recognize the amount of conservation the Marine Corps does, " said Martin Husung, a natural-resource specialist on the base.

WSJ: An Army of Biologists Are on Nature Patrol at Military Bases

The unconventional-gas bonanza has roughly doubled the gas resource base, a measure of the total gas in the ground rather than what might be economically recoverable.

ECONOMIST: An unconventional bonanza