Now and Then

通过对过去生活的回顾,可以促使孩子们思考科技是怎样简化人们的劳动,从而改变人们的生活的。

Now and Then
Now and Then
Now and Then
Now and Then
Now and Then
Now and Then
Now and Then
Now and Then
Now and Then
Now and Then
Now and Then
Now and Then
Now and Then
Now and Then
Now and Then
Now and Then
Now and Then
Now and Then
Now and Then
Now and Then
Now and Then
Now and Then

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