六级These included developing additional domestic sources (such as those on Alaska's North Slope), resuming extraction at sites that had been shut down because of cost inefficiency, capping the price that domestic producers could charge for oil, and beginning to import oil from a greater diversity of nations.
这些措施包括开发更多的国内资源（如阿拉斯加北坡的资源），恢复因成本低效率而关闭的开采场地，限制国内生产商可以收取的石油价格，以及开始从更多不同的国家进口石油。
2013年6月阅读原文
四级This means that some wells may even need to undergo desalination after extraction, thus increasing the cost.
这意味着一些油井甚至需要在提取后进行脱盐，从而增加了成本。
2018年12月四级真题（第一套）阅读 Section C
六级But there are also many examples of growing wealth by trashing the environment, in rich and poor parts of the world alike, whether through unregulated mineral extraction, drastic water use for agriculture, slash-and-burn farming, or fossil-fuel-guzzling ( ' , 大量消耗) transport.
但也有许多例子表明，无论是通过不受管制的矿物开采、农业用水的大量使用、刀耕火种的耕作还是化石燃料的大量消耗，世界上的贫富地区都有通过破坏环境来增加财富的例子，大量消耗) 运输。
2016年6月阅读原文
六级But there are also many examples of growing wealth by trashing the environment, in rich and poor parts of the world alike, whether through unregulated mineral extraction, drastic water use for agriculture, slash-and-burn farming, or fossil-fuel-guzzling t
但也有许多通过破坏环境来增加财富的例子，无论是在世界的富裕地区还是贫穷地区，无论是通过不受管制的矿物开采、农业用水的急剧增加、刀耕火种的耕作还是化石燃料的大量消耗
2016年6月六级真题（第三套）阅读 Section B
四级It is profitable to drill to depths more than 1,000 feet for oil and gas extraction, but only recently in California has it become profitable to pump water from this depth.
钻探深度超过1000英尺以开采石油和天然气是有利可图的，但直到最近在加利福尼亚州，从这个深度抽水才变得有利可图。
2018年12月四级真题（第一套）阅读 Section C
考研Though all the subjects were drawn from a population of European extraction, care was taken to see that all subjects, friends and strangers, were taken from the same population.
虽然所有的受试者都来自欧洲血统的人群，但要注意确保所有受试者，包括朋友和陌生人，都来自同一人群。
2015年考研真题（英语一）完形填空 Section Ⅰ
考研The capacity to use a raw material depends on various factors, such as means of access, methods of extraction, and techniques of processing.
使用原材料的能力取决于各种因素，如获取手段、提取方法和加工技术。
1984年全国硕士研究生入学统一考试英语试题
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