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perennials是什么意思

perennials

英[pə'renɪəls] 美[pə'renɪrls]

n. 多年生植物( perennial的名词复数 )；

柯林斯高阶英汉双解学习词典释义

ADJ-GRADED

（尤指问题或困难）永恒的，持续的，亘古不变的

You use perennial to describe situations or states that keep occurring or which seem to exist all the time; used especially to describe problems or difficulties.
例句
...the perennial urban problems of drugs and homelessness... 毒品和无家可归这两个一直困扰城市的问题 There's a perennial shortage of teachers with science qualifications. 有理科教学资格的老师一直都很短缺。
ADJ

（植物）多年生的

A perennial plant lives for several years and has flowers each year.
例句
...a perennial herb with greenish-yellow flowers. 开绿黄色花的多年生香草

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