Why do coins have different values? Coins have different values so you can buy items that cost different amounts. The value of the coin is how much it is worth. You also need different value coins so ...
What are positions and directions? You can use position words to describe where something or someone is. For example, you can use words such as, 'above', 'below', 'near', 'far', 'up' or 'down'. You ...
Abstract: As a key technique for enabling artificial intelligence, machine learning (ML) is capable of solving complex problems without explicit programming. Motivated by its successful applications ...
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