| 1. | When the pigment absorbs light ( or , more precisely , absorbs discrete packets of energy called photons ) , the added energy causes the retinal to change shape , triggering a cascade of molecular events leading to excitation of the cone cell
视色素一旦吸收了光线（更精确的说法是吸收了称为光子的特定能量单元） ，新增加的能量就会改变视黄醛的形状，因而引发一连串的分子事件，造成锥细胞的兴奋。 |
