您要查找的是不是：
- A chemical derived from petroleum or natural gas. 石油化学制品从石油或天然气中提炼出的化学产品
- A severe natural gas shortage shut down many plants. 天然气的严重缺乏使许多家工厂都停工了。
- They continued down until they came to some pockets of natural gas. 他们继续往下钻，终於找到了一些天然气的气阱。
- natural gas examination 天然气检测
- Ten dollars' worth of natural gas; wanted their money's worth. 值十美元的天然气; 需要它们的货币价值
- A gaseous fuel, such as natural gas. 气体燃料处于气态的燃料，如天然气
- The pipeline conveys natural gas to the Midwest. 管道将天然气输送到中西部。
- Where are oil and natural gas found in Britain? 在英国哪里发现了石油和天然气?
- Shizhu County Natural Gas Chemical Facto. 石柱县天燃气化工厂。
- Refined oil, the natural gas market supply stable. 成品油、天然气市场供应平稳。
- Natural Gas Hydrate: the savior of energy crises? 可燃冰:能源危机的拯救者?
- Has natural gas been found in this area? 这个地区发现天然气了吗?
- Natural gas will be the first to run out. 天然气将首先被用完。
- Natural gas is often present in the reservoir rock. 储油岩中常有天然气。
- Exports: crude oil, natural gas, refined products. 出口:重油;天然气;精炼产品.
- A well or drilling that yields natural gas. 一种产天然气的井或钻井
- The production or natural gas declined slightly. 下倾，下降；衰退，衰落；谢绝，拒绝
- The output of natural gas ballooned. 天然气产量迅速提高。
- Encana's main business is natural gas, is it right? 它曾经以产气为主，区块大部分是气田。近年来，也搞些轻油和重油。
- The atmosphere is rich in natural gas. 这个气层的天然气储量很大。
