(botany) a plant lasting for three seasons or more
造句
用作名詞(n.)
Direct domestication of wild perennials is the more straightforward approach to creating perennial crops. 要創造出多年生作物，直接馴化野生的多年生植物，是較直截了當的做法。
Perennials - It makes sense to eliminate perennial weeds early.By pulling those first plants, you might prevent a hostile lawn takeover. 多年生植物，盡早去除很有意義，當把大量雜草去處后，就可以避免草坪被雜草統治。