translation.en: A good forensic expert also has to be a good educator, a good communicator, and that's part of the reason why we take the pictures, to show not only where the light sources are, and what we call the spill, the distribution, but also so that it's easier for the trier of fact to understand the circumstances.
translation.zh: 一个好的鉴定专家，首选得是一个好老师 善于交流沟通。也是我们拍摄 这些照片的目的。这样我们不仅可以 展示光源的位置，光源的照射角度， 光照的分布，还可以让证据鉴定人 让法官直观理解现场的环境。