介词短语
中文翻译：在
同义词：
['under the protection of', 'under the aegis of', 'under the leadership of']
例句：
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1. The company is under the banner of environmental sustainability.
该公司以环保可持续为宗旨。
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2. The new policy was introduced under the banner of fairness and justice.
新政策以公平正义为旗号推出。
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3. The team won the championship under the banner of hard work and dedication.
该团队以勤奋和奉献的精神赢得了冠军。