Digital Products
I like digital products. It is advanced and convenient. For example, nowadays our family has a
digital camera. We can take pictures whenever we want. We have taken many photos about our life.
But in the past, if we want to take pictures, we have to go to the photographic studio. It is
inconvenient and expensive. So we only take photos once a year. This is one classical example.
There are many similar examples.
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