perennial
[pə'ren.i.əl] adjective
■lasting a very long time, or happening repeatedly or all the time 长期存在的；常年的；不断发生的；反覆的•The film 'White Christmas' is a perennial favourite.《白色圣诞》是一部经久不衰、深受欢迎的影片。 •We face the perennial problem of not having enough money.我们长期面临资金不足的问题。 Compare annual ; biennial
[pə'ren.i.əl] noun countable
■a plant that lives for several years 多年生植物•Roses and geraniums are perennials, flowering year after year.玫瑰和天竺葵是多年生植物，年复一年地开花。 Compare annual |