很多人都喜欢喝能量饮料，认为有营养能补充能量又好喝。但是一些能量饮料每罐或每瓶含有高达400mg的咖啡因，会对身体造成极大危害。

我们来看一段相关的英文报道

Often, the energy we get from what we eat and drink is measured in kilojoules. Energy drinks can have high levels of kilojoules, and some doctors are warning people to put them down.

In addition, the amounts of caffeine that energy drinks say they have are inaccurate and they're not regulated by the Food and Drug Administration.

A lot of caffeine and stimulants, things that are designed to actually stimulate the body's metabolism, would stimulate the body overall. They can lead to all sorts of different things, such as increasing heart rate and blood pressure, restlessness as well as insomnia.

通常，我们所食用的食物和摄入的水分是通过千焦耳测算的。能量饮料的千焦耳含量很高，许多医生警告要减少能量饮料的摄入量。

而且能量饮料上标注的咖啡因含量是不准确的，并没有经过食品和药品管理局的监管。

大量咖啡因，以及含有许多能够加快身体新陈代谢的兴奋剂，让全身都兴奋起来。这些物质能够引起各种不良隐患，诸如增加心率、血压上升、焦躁不安以及失眠。

【讲解】

文中的energy drink就是“能量饮料”的意思，也称为“功能性饮料”，其中energy是名词，意为“活力;能量”，多用作不可数名词，如：energy sources (能源);在指人的“精力”时多用复数形式，如：She flung all her energies into her work. (她把全部精力都投到工作上。);相关词汇：soft drink(软饮料)，fizzy drink(汽水)，cold drink(冷饮)等。

第三段中的stimulate是动词，意为“刺激，使兴奋”，如：The medicine will help stimulate the function of the patient's organs. (这种药有助于促进病人的器官功能。)

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