Louis Daguerre invented photography in 1829, and earlier today, when you whipped out your smartphone and you took a shot of your awesome sandwich, and you know who you are —  — wasn't that easier than exposing the image to copper plates coated with iodized silver?
1829年路易达盖尔发明了摄影， 今天稍早的时候， 你拿出手机， 拍你的‘棒极了’的三明治的时候， 你们知道我说的是谁— — 难道不比把图像在覆盖了 碘化银的铜片上曝光容易吗？