As printing methods improved, Christmas CARDS were produced in large Numbers from about 1860.
随着印刷术的改进，从1860年起，每年会生产大量的圣诞贺卡。
This resulted in an inexpensive way to correspond with large Numbers of friends, and as printing methods improved, Christmas card production increased.
这导致了相应的一种并不昂贵的方式与众多的朋友，并且印刷、圣诞卡方法大大提高了产量增加了。
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