1640s, "evergreen," formed in English from Latin perennis "lasting through the year (or years)," from per- "through" (see per) + annus "year" (see annual). Botanical sense of "Remaining alive through a number of years" is attested from 1670s; figurative meaning of "enduring, permanent" is from 1750. Related: Perennially. For vowel change, see biennial. The noun meaning "a perennial plant" is from 1763.
实用例句
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。来自柯林斯例句
2. the perennial problem of water shortage
缺水这个老问题来自《权威词典》
3. I wonder at her perennial youthfulness.
我对她青春常驻感到惊讶.来自《简明英汉词典》
4. 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。来自辞典例句
5. The novel's central theme is the perennial conflict between men and women.
