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在清代我国近海海域被划分为内洋、外洋和公海性质的大洋。清人在日常生活中主要根据离岸远近、水色深浅、有无沙洲暗礁、山岛多少等这些显著的海洋地理特征对内外洋进行描述。内外洋的划分多以岛屿、港湾、沙洲等作为标志。这些共性的地理特征或许是清人对内外洋较普遍的认知。
In the Qing Dynasty, China’s offshore waters were divided into oceanic, oceanic and oceanic oceans. Qing people in their daily lives mainly based on offshore distance, depth of water, with or without sandbar reefs, how many islands, such as the island’s remarkable oceanographic features described inside and outside the ocean. Divided by more than the island, harbor, sandbar and other signs as. These common geographical features may be the Qing people’s understanding of the more common inside and outside.