暗周期的英文

light-dark cycles

• 暗:    dark; dim; dull
• 周期:    period; cycle; cir ...
• 大周期, 主周期:    main cycle

例句与用法

1. If the dark period was too short, the photochemical system was not completely regenerated .
   如果暗周期太短，光化学系统不能完全再生。