| 释义 |
pho·to·pe·ri·od AHD[fō'tō-pĭrʹē-əd] D.J.[ˌfəʊtəʊˈpɪriːəd]K.K.[ˌfotoˈpɪriəd]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
pho'tope'riodʹic AHD[-ŏdʹĭk] 或 pho'to·pe'ri·odʹi·cal [-ĭ-kəl] （形容词） |