Benchmark crude; marker crude [oil]: Saudi Arabian (gravity API 34 degrees) light crude oil employed as the standard on which OPEC price changes have been Based.是什么意思_Benchmark crude; marker crude [oil]: Saudi Arabian (gravity API 34 degrees) light crude oil employed as the standard on which OPEC price changes have been Based.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句