两年生植物；生命周期为两年,第一年发芽生长,第二年开始开花结果后通常枯死的植物。
biennials — plural of biennial
两年生植物；生命周期为两年,第一年发芽生长,第二年开始开花结果后通常枯死的植物。
两年生植物；生命周期为两年,第一年发芽生长,第二年开始开花结果后通常枯死的植物。
A plant that requires two years to complete its life-cycle, germinating and growing in its first year, then producing its flowers and fruit in its second year, after which it usually dies.
每两年发生一次的事件。
An event that happens every two years.
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