perennial

adj.

1. 长久的；持续的；反复出现的
   continuing for a very long time; happening again and again
   1. the perennial problem of water shortage
      缺水这个老问题
   2. that perennial favourite, hamburgers
      汉堡包，这种永远受喜爱的食品
2. 多年生的
   living for two years or more

noun

1. 多年生植物
   any plant that lives for more than two years

1. 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.
   1. ...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
   2. 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。
2. ADJ （植物）多年生的
   A perennial plant lives for several years and has flowers each year.
   1. ...a perennial herb with greenish-yellow flowers.
      开绿黄色花的多年生香草
   2. Perennial is also a noun.
      
   3. ...a low-growing perennial.
      多年生矮小植物

1. A perennial is a plant that lives indefinitely
   多年生植物是指能存活很多年的植物。
2. 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。
3. The novel's central theme is the perennial conflict between men and women
   小说的主题是男人和女人之间永无休止的冲突。
4. Wild rice stem belongs to herb of marsh of gramineous vivacious perennial root.
   茭白属于禾本科多年生宿根沼泽草本植物。
5. Short hairy perennial with early spring blue-violet or lilac flowers; North America and Siberia.
   短的、有毛的多年生植物，早春开紫罗兰色或淡紫色的花；产自美国北部和西伯利亚。
6. Old World tropical herbaceous perennial of the agave family; in some classifications considered a genus of Liliaceae.
   龙舌兰科一个旧大陆热带多年生草本属；有些分类认为它是百合科的一个属。
7. Perennial herb with yellow flowers; southern and south central United States.
   开黄花的多年生草本植物；美国南部和中南部。
8. Slightly hairy perennial having deep green leathery leaves and flowers that are ultimately purplish-green.
   带细微毛的多年生草本植物，具有深绿色的、似皮革的叶子和最后成为紫绿色的花。
9. Stout perennial of eastern and central North America having palmate leaves and showy racemose blue flowers.
   北美洲东部和中部的一种健壮的多年生植物，有掌状叶和艳丽的蓝色总状花序。
10. Erect perennial of wet woodlands of North America having leaves and flower buds resembling those of soapwort.
    北美洲潮湿的林地中的多年生植物，叶子和花蕾类似肥皂草的叶和花。
11. Viscid branched perennial of the southwestern United States and northern Mexico having tuberous roots and deep red flowers.
    美国西南部和墨西哥北部的长有粘质树枝的多年生植物，具有块状根茎和深红色花朵。
12. Cosmopolitan genus of annual and biennial and perennial herbs: cress.
    一个一年两年和多年生世界性草本植物属；水芹。
13. Poisonous Eurasian perennial herb with broad rounded leaves and yellow flowers and fibrous rootstock.
    一种有毒的欧亚草本植物，具有宽的圆形叶、黄色的花和纤维状根状茎。
14. European perennial plant naturalized in United States having triangular ovate leaves and lilac-pink flowers.
    欧洲多年生的植物，移入美国，有三角形的卵形的叶子和丁香粉色的花。
15. Annual or perennial grasses including decorative and meadow species as well as notorious agricultural weeds.
    一个一年或多年生禾本属，包括装饰性和草坪用草品种和声名狼藉的农业杂草。
16. Low-growing woody shrub or perennial with woody base.
    一种矮生的木本灌木或多年生灌木，具有木质基部。
17. Tall handsome perennial herb of southeastern United States having maplelike leaves and white flowers.
    美国东南的高的美丽的多年生草本植物，有象枫木的叶子和白色的花。
18. Annual to perennial herbs of the Mediterranean region.
    地中海地区一个一年或多年生草本属。
19. Genus of perennial tuberous-rooted plants of Mexico and Central America.
    墨西哥和中美一个多年生块茎根植物属。
20. Perennial herbs and shrubs and lianas; cosmopolitan especially in salt-water areas.
    多年生草本和灌木和藤蔓植物；广域特别在咸水区域。
21. Genus of tall erect or branched American annual or perennial herbs with showy flowers: sunflowers.
    美洲的一个一年生或多年生草本属，高大而直立或多分枝，花艳丽；向日葵。
22. European perennial grass widely cultivated for pasture and hay and as a lawn grass.
    欧洲多年生草，广泛栽培用作牧草、干草和草坪草。
23. Arborescent perennial shrub having palmately lobed furry leaves and showy red-purple flowers; southwestern United States.
    树木状的多年生的灌木，有叶状的有舌苔的叶子和艳丽的紫红色的花；分布在美国的西南部。
24. Low-growing perennial herb with pungent gingery leaves and rhizomes.
    缓慢生长的多年生草本植物，具有辛辣姜味的叶和根茎。
25. Perennial of northern hemisphere with slender stems and bell-shaped blue flowers.
    北半球终年植物，有纤细的茎干和铃状花。
26. Perennial or annual aquatic or marsh plants.
    常年或一年生水生或沼泽植物。
27. Perennial of arctic Europe having large white flowers with inflated calyx.
    长有肿胀花萼和大型白色花朵的欧洲北极地区的多年生植物。
28. Tall perennial herb of tropical Asia with dark green leaves; cultivated for flax-like fiber from its woody stems.
    热带亚洲多年生高草本植物，叶黑绿；种植以求得到其木质茎中的亚麻状纤维。
29. Mosses with perennial erect gametophores and stems with rows of leaves and drooping capsules.
    配子托四季直立的苔藓，茎上有成排的叶子和下垂的蒴果。
30. Annual to perennial grasses of temperate northern hemisphere and South America: barley.
    北半球和南美洲温带地区一个一年至多年生禾本科植物的属；大麦。

noun

1. (botany) a plant lasting for three seasons or more

adj

1. recurring again and again
   1. perennial efforts to stipulate the requirements

   Synonym:    recurrentrepeated

2. lasting three seasons or more
   1. the common buttercup is a popular perennial plant

3. lasting an indefinitely long time
   1. perennial happiness