New words:

perennial [pəˈreniəl]
adj.多年生的;持久的;反复出现的;常年性的
n.多年生植物

per- 始终 / 一直 + -enn- 年 + -ial 形容词后缀 → “持续多年的”,核心语义围绕 “时间长(超过两年)” 展开,可描述植物或抽象事物。

必记搭配:

形容词核心搭配:

perennial plant/flower(多年生植物 / 花卉)、perennial problem(长期存在的问题)
perennial issue(长期难题)、perennial demand(持续需求)

名词搭配:

garden perennials(园艺多年生植物)、common perennials(常见多年生植物,如 “lilies” 百合)

Sample Sentences:

This perennial can live for more than five years if it gets enough water.
Roses are perennial flowers—they bloom every year if you take care of them.
Air pollution is a perennial problem in China's northeast which is home to many heavy industries including coal mining.


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