translation.en: Now, if these were random doodles or decorations, we would expect to see a lot more variation, but instead what we find are the same signs repeating across both space and time.
translation.zh: 如果这些符号是随意画下的， 应该会更多种多样， 然而，我们却看到同样的符号 在不同时间、不同地点被反复使用。