同一图片、视频和文件在多个聊天中使用时，并不会重复占用手机存储空间。
SSIM (Structural Similarity Index Measure) compares two images by evaluating luminance, contrast, and structural patterns across local windows. It returns a score from -1 to 1: 1.0 means the images are pixel-identical, 0 means no structural correlation, and negative values mean the images are anti-correlated (less alike than random noise). For glyph comparison, it answers the question: do these two rendered characters share the same visual structure?
，详情可参考夫子
2026 年，中国的科创会怎样？
Наука и техника