0 happening once every two years -- 两年一次的
1 a plant that lives for two years, producing seeds and flowers in its second year -- （第二年开花的）两年生植物
Seeds that germinate in late autumn become biennials.
Plants used for bedding are generally annuals, biennials or tender perennials; succulents are gaining in popularity.
Though perennial, cultivars may be short-lived and thus best treated as biennials.
Most are seasonal plants (annuals or biennials), but some are small shrubs.
The term is often used to differentiate a plant from shorter-lived annuals and biennials.
Herbs can be perennials such as thyme or lavender, biennials such as parsley, or annuals like basil.
They are biennials (rarely short-lived perennials) with branched, spinose winged stems, growing 0.53 m tall.
They can be annuals, biennials, or perennials, upright or decumbent.
