短語(yǔ)詞組短語(yǔ)perennially frozen 永凍地perennially young 青春永駐maintain perennially 宿生保持perennially frozen lake 常年封凍湖Flower perennially in bloom 鮮花常年盛開(kāi)perennially frozen ground 長(zhǎng)期凍土;永久凍土;永凍地;冰凍地Perennially frozen soil zone 多年凍土地區(qū)perennially frozen g 永凍地 返回 perennially