原油对外依存度是指一个国家原油净进口量占本国石油消费量的比例，体现了一国石油消费对国外石油的依赖程度。
为了能够降低原油对外依存度、保证国家能源安全，必须着力提高国内油气资源勘探和开发的水平。
It is necessary to improve the exploration and development levels of oil and gas resources in order to reduce the crude oil dependency and ensure national energy security.
虽然出现了总消耗量下降的趋势，但欧盟对原油的对外依存度越来越高，目前已占到该地区能源总消耗量的88%。
Despite this decline, the EU has become increasingly dependent on crude oil imports, which now amount to 88% of the region's total consumption.
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