英 [pəˈreniəl] 美 [pəˈreniəl]
adj. 多年生的；常年的；四季不断的；常在的；反复的
n. 多年生植物
复数perennials
perennial /pəˈrɛnɪəl/
形容词 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. 不断出现的; 长期存在的 (问题、困难)
...the perennial urban problems of drugs and homelessness.
…城市长期存在的毒品和无家可归的问题。
形容词 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.
…一种开黄绿色花的多年生草本植物。
可数名词 Perennial is also a noun. 多年生植物
...a low-growing perennial.
…一种长不高的多年生植物。
a plant lasting for three seasons or more
lasting three seasons or more
the common buttercup is a popular perennial plant
lasting an indefinitely long time; suggesting self-renewal
perennial happiness
常年性-引用次数：52
Conclusion: The vocational environment is related with the allergic to dust mites in the patients of perennial allergic rhinitis among different occupational groups in Huainan . The labor protection should be strengthened to the specific occupational groups.
结论：淮南地区不同职业中常年性变应性鼻炎患者对尘螨的过敏情况与职业环境有关，应加强对特定职业人群的劳动保护。
多年生的
多年生长的
多年生植物
多年生的;多年生植物
... peremptory 不容反抗的；专横的 perennial 终年的；永久的 perfervid 非常热心的 ...
根据您的庭园设计好布局, Shade garden的植物都可以包括灌木(Shrub), 多年生(Perennials)和草本花(Annuals), 并且也可以种一些郁金香之类的Bulbs，只是要把它们当成是一年生， 每年换新的Bulbs。
... annual adj.一年一次的,每年的,一年生的 n.一年生植物,年刊,年鉴 perennial adj.四季不断的,终年的,长期的,永久的,(植物)多年生的 complex adj.复杂的,合成的,综合的 n.联合体 ...
... annuity年金；养老金 perennial终年的；长期的 anthropology人类学 ...
perennially 永久地
perennation [植] 多年生；多年生长
What about perennial growers?
多年生植物种植者呢？
The perennial vegetation adjusts to the aridity by means of various avoidance mechanisms.
多年生植物会采用各种躲避机制以适应干旱。
We learned that the Botai were able to build large perennial villages, sometimes with hundreds of homes.
我们了解到博泰人能够建造大型的常年村庄，有时候村里有上百户人家。
Ever-returning spring, trinity sure to me you bring, Lilac blooming perennial and drooping star in the west, And thought of him I love.
VOA : special.2009.12.31
And that's a perennial issue in philosophy.
这在哲学上也是一个经久不衰的问题。
人性课程节选 : 普林斯顿公开课
It's been a perennial classic.
它已经成为经典
金融市场课程节选 : 耶鲁公开课
The Pittsburgh Penguins won the National Hockey League title by beating perennial favorites the Detroit Red Wings in seven games.
VOA : standard.2009.12.24
As the so-called 20-aughts end, the Yankees,Lakers,Steelers and other perennial powers hope to continue their tradition of winning.
VOA : standard.2009.12.24
The perennial appeal of its literary and social aspects has delighted readers since its first appearance.
As a perennial warning against the abuse of government power, that story has merit.
The positive statistics may not end the perennial debate over whether A-levels have been "dumbed down".