For example, the camera on its Pixel phones can be used to detect respiration and heart rates by tracking the subtle colour difference brought about by the fact that blood with fresh oxygen in it is slightly brighter.

例如，其 Pixel 手机上的摄像头可用于检测呼吸和心率，方法是跟踪含有新鲜氧气的血液略微变亮所带来的细微色差。