large brown seaweeds having fluted leathery fronds
kelp详细解释
kelp
n.(名词) Any of various brown, often very large seaweeds of the order Laminariales. 巨藻:昆布目植物,有深浅各种褐色,通常是大型海草中的一种 The ash of these seaweeds, used as a source of potash and iodine. 海草灰:这种海草的灰常作为提炼钾和碘的原料