1. A brittle, grayish-brown, Arctic lichen (Cetraria islandica) sometimes used as a food or in medicine.是什么意思_1. A brittle, grayish-brown, Arctic lichen (Cetraria islandica) sometimes used as a food or in medicine.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句