This month, we celebrate the Fourth of July. What does this day mean for Americans?
People also like to be outside. Some families have picnics or pool parties. Some families go camping or go to the beach.
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America turned 100 in 1876. There was a big fair. … read more
Light caused by people is called artificial light. Artificial light … read more
The light does not hurt your eyes. But screens can … read more
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