表层采样器 snapper grab sampler
微表层采样器 [海洋] surface microlayer sampler
代表性采样层 representative sampling horizon
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研究成果表明，河漫滩表层沉积物是森林超低密度地球化学调查的最佳采样介质。
Studies show that surface sediments of the flood land seem to be the best sampling media in ultra-low density geochemical investigation in forest-swamp areas.
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