老照片中沒(méi)有人笑的原因

Looking at portrait1 photos from the past， you may notice a common trend.The old portrait photographs often show adults and children looking serious and notsmiling. This can even be seen in photos of weddings and celebrations where youexpect happiness and joy. You will mostly notice this in portraits taken in the late18th century and throughout the 19th century. But why did people not smile infront of the camera？ In this article， we will look at the history of photography andthe traditions around portraiture2.

看看過(guò)去的肖像照片，你可能會(huì)注意到一個(gè)共同的趨勢(shì)。（剩余3722字）