perennial

柯林斯詞典

1. ADJ You use perennial to describe situations or states that keep occurring or that seem to exist all the time; used especially to describe problems or difficulties. 不斷出現(xiàn)的; 長(zhǎng)期存在的 (問題、困難)
...the perennial urban problems of drugs and homelessness. …城市長(zhǎng)期存在的毒品和無(wú)家可歸的問題。
2. ADJ A perennial plant lives for several years and has flowers each year. (植物) 多年生的
...a perennial herb with greenish-yellow flowers. …一種開黃綠色花的多年生草本植物。
3. N-COUNT Perennial is also a noun. 多年生植物
...a low-growing perennial. …一種長(zhǎng)不高的多年生植物。