Before the phone may need to use the first light, and then charge, but also need to repeat the operation 3-4 times before it can be called activation.
以前的手机可能需要先把电用光，再进行充电，而且需要反复操作3 - 4次才可以，这被称之为激活。
2
Of course, the only thing we ever "see", really, is the activation of our retinal cells - that's what our brains interpret as light from the outside world.
当然，唯一我们“看到”的是视网膜细胞的激活也就是大脑解读的：外界的光线。
3
This paper refer hybrid sensor types to activation of power supply, activation of light source, silicon microtechnology.