Caffeine is a chemical substance that stimulates the nerves of the body. Drinking coffee tends to make people a little bit more

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问题 Caffeine is a chemical substance that stimulates the nerves of the body. Drinking coffee tends to make people a little bit more awake.

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答案咖啡因是一种能够刺激人体神经的化学物质。喝咖啡往往会让人变得更清醒一些。

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