red and far red light 红光与远红光
The phytochrome molecule is the photoreceptor used by plants to sense environmental red and far-red light changes, which are vital to direct growth and development.
光敏色素是植物感受外界环境变化的最重要光受体之一，对红光和远红外光非常敏感。
A ratio of less red and to more far-red light would cause a reaction from the plant.
较少红光和较多远红光的比例会引起植物的反应。
There will be less red light and more far-red light than normal.
红光会比平时少，远红光会比平时多。
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