民以食为天。对人类来说，吃历来不是一件简单的事。饮食文化中的一些相当强的社会、情感和行为力量对我们吃什么、什么时候吃、在哪里吃、吃多少起着作用。

Food matters to human beings, for whom eating has never been a simple matter. Some pretty strong social, emotional and behavioral forces in dietary culture play a part in determining what, when, where and how much we eat.

饮食对我们的健康有着重要的影响。 我们通过饮食来获得所需的各种营养素和能量来维持自身的健康。不合理的饮食、营养过度和不足，都会给健康带来不同程度的危害。

Diet has a significant impact on our health. We maintain our health through various nutrients and energy derived from diet. But irrational diet, an excess of or deficiency in nutrients, can bring harm to our health to varying degrees. 

“病从口入”这一说法得到不少研究的证实。人类大概有80%的疾病与饮食有关，已知可预防癌症原因中至少40%与饮食有关。

The saying "Illness comes from food" has been confirmed by quite a number of researches. About eighty percent of all human illnesses are related to diet and at least forty percent of the known preventable causes of cancer are related to diet as well.

饮食过度会因营养过剩导致肥胖症、糖尿病、高血压等多种严重影响健康疾病。

Overeating may contribute to a number of serious health-threatening conditions such as obesity, diabetes, and hypertension.

这表明，目前强调通过饮食来预防疾病的努力没有错，这是因为比一些其他危险因素，如吸烟、肥胖等，饮食是更容易改变的。

This shows that the current emphasis on dietary prevention of disease is not a misplaced effort, since diet is more easily changed than certain other risk factors, such as smoking or obesity.

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