In the dark, these structures expand dramatically, taking in the available light.

在黑暗中，这些结构急剧扩张，吸收可用的光线。

The camera upgrades aim to make it easier for users to capture higher quality pictures, especially when available light is low.

相机升级，用户更容易拍更高质量的照片，特别是在可用光线较低的情况下。