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    photoperiod

    详细解释:n. 光周期

    词型变化:

    形容词:photoperiodic

    详细解释:


    pho.to.pe.ri.od

    n.(名词)
    The duration of an organism`s daily exposure to light, considered especially with regard to the effect of the exposure on growth and development.
    光周期:有机物每天暴露于阳光的时间,着重考虑的是暴露于阳光对生长和发展的影响

    【引伸】
    pho.tope.riod.ic