biennial

• 表示每两年发生一次的事物，即两年一次的。也可指持续两年的事物，即两年期的。

Describes something that occurs every two years.

1. Plant life cycleB2formalscientific

   Describing a plant that completes its life cycle in two years, typically flowering and producing seeds in the second year before dying.

   二年生

   • Carrots and parsley are biennial plants.
   • The biennial flower bloomed in its second season.
   • Gardeners often treat biennials as annuals in colder climates.

   反义词annualperennial

2. Two-year durationB2formal

   Lasting for a period of two years.

   两年的

   • The biennial cycle of the plant requires careful planning.
   • Some crops have a biennial growth pattern.
   • The biennial nature of the species affects its cultivation.

   同义词two-year

3. B2formal

   Occurring once every two years.

   每两年一次

   • The biennial conference attracts experts from around the world.
   • They organize a biennial art exhibition in the city.
   • The committee holds biennial elections for its members.

   同义词biyearly

• 指生命周期为两年的植物，通常在第二年开花结果后死亡；也可指每两年发生一次的事件或两年一次的展览（如双年展）。

A noun referring to a plant that completes its life cycle in two years, typically flowering and fruiting in the second season before dying.

1. Plant life cycleB2formalscientific

   A plant that completes its life cycle in two years, typically germinating and growing leaves in the first year, then flowering and dying in the second year.

   二年生植物

   • Carrots and parsley are common biennials grown in gardens.
   • The biennial produced lush foliage in its first season before blooming the following spring.
   • Many biennials require a cold period to trigger flowering in their second year.

2. Life cycle durationB2formalscientific

   Describing a life cycle that spans two growing seasons, from germination to death.

   两年生植物

   • The biennial nature of the plant means it will not flower until its second year.
   • Gardeners often treat biennials as annuals by replanting each year.
   • The study focused on the growth patterns of biennial species in temperate climates.

   反义词annualperennial

3. Frequency of occurrenceB2formal

   Happening once every two years.

   每两年一次

   • The biennial conference attracts experts from around the world.
   • They organize a biennial art exhibition in the city.
   • The committee meets on a biennial basis to review progress.

   同义词biyearly