With deep red background, however, there was no color printing technology, so finally are black and white photos.

虽然采用深红色背景拍摄，然而当时并没有彩印技术，故拍出的都是黑白照片。

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With deep red background, however, there was no color printing technology, so finally are black and white photos.

虽然采用深红色背景拍摄，然而当时并没有彩印技术，故拍出的都是黑白照片。

youdao