biennials是什么意思？

biennials

两年期

例句

• Herbage can be divided into three categories : annuals , biennials, and perennials. 草本植物可分成一年生 、 二年生和多年生.

柯林斯高阶英汉双解学习词典释义

• ADJ
  两年一次的
  A biennial event happens or is done once every two years.
  例句
  ...the biennial Commonwealth conference. 两年一届的英联邦会议
• N-COUNT
  二年生植物
  A biennial is a plant that lives for two years. It flowers, produces seed, and dies in its second year.