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insular island peninsula islet marine maritime moist ledge oasis tide ebb continent terrestrial outskirt region endemic cosmopolitan subterrane subterranean cavern flaw cleft crevice gap zone equator longitude altitude latitude meridian subsidiary Antarctic Antarctica Arctic coastland hemisphere contour geography horizon lowland plain strait channel valley volcano plateau basin navigation ranges salinity sediment elevation formation geothermy terrain topography tropical tropics temperate (责任编辑：admin) |
