The principle is simple: readers submit photos of old photos, held up against the original backdrop, and caption them with short, often quite poignant letters to the original image.
原则很简单：读者提交放到原有背景上的老照片的照片，然后加上简单说明，通常是对老照片的辛酸文字。
Submit your photos and vote for your favorites at the bottom of this post.
提交您的图片并为底部列表中您喜欢的图片投票。
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