数年前，壳牌石油公司在加拿大和美国发起了一个十分成功的广告宣传活动。

Some years ago, Shell carried out a very successful AD campaign in Canada and the US.

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英国石油公司也可降低在由其合伙人经营的美国油田中的持股，如在荷兰皇家壳牌石油公司(Royal Dutch Shell PLC)运营的Gulf field Mars中的持股。

Or BP may reduce its stakes in U.S. fields operated by partners, such as the Gulf field Mars, operated by Royal Dutch Shell PLC.

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在近期美国举行的基金会大会上，我们有幸听取了壳牌化学公司资产利用经理所发表的主题演讲。

At our recent General Assembly held in the United States, we had the pleasure to hear a keynote speech delivered by the Manager of Asset Utilization from Shell Chemicals.

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