例句 /

An addictive drug that 90% of Americans consume every day, caffeine prevents us from getting our ZZZZs by increasing nerve activity in our bodies-keeping us alert and hyperactive.

An addictive drug that 90% of Americans consume every day, caffeine prevents us from getting our ZZZZs by increasing nerve activity in our bodies-keeping us alert and hyperactive.

咖啡可以让人保持清醒,达到一个兴奋状态,这都要归结于它内含的咖啡因。那么咖啡因是如何作用我们的神经,让我们保持兴奋的呢?