The neuron uses its natural protein-making machinery to fabricate these little light-sensitive proteins and install them all over the cell, like putting solar panels on a roof, and the next thing you know, you have a neuron which can be activated with light.
神经元用它自身的蛋白质合成器 来组装出这些小型的光敏蛋白质 并使其分不到细胞各处 就像在顶层架设太阳能板 接下去 你就有了个光敏的神经元