n.多年生植物
名词perennial的复数.
Direct domestication of wild perennials is the more straightforward approach to creating perennial crops. 要创造出多年生作物,直接驯化野生的多年生植物,是较直截了当的做法。
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,尽早去除很有意义,当把大量杂草去处后,就可以避免草坪被杂草统治。