perennial

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; 長期存在的 (問題、睏難)

...the perennial urban problems of drugs and homelessness. …城市長期存在的毒品和無家可歸的問題。

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. …一種長不高的多年生植物。