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设置于海上、海岸或江河的易见处,以特定的标志、灯光、音响或无线电信号,用以帮助船舶定位、引导船舶航行、表示警告和指示碍航物的人工标志。全称助航标志。
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ethical thoughts of Taoism
ethical validity of study
Ethical value
ethic of artistic creation
ethic of biomedical research involving human subjects
ethic of cloning
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Ethics
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Ethics and Language
Ethics and the Limits of Philosophy
Ethics and the Materialist Conception of History
Ethics as First Philosophy
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Ethics, Demonstrated in Geometrical Order
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Ethics Guidelines
Ethics in Engineering
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