翻译一段英文Eat for a Good and Healthful LifeFood keeps us alive.

翻译一段英文
Eat for a Good and Healthful Life
Food keeps us alive. It is our sustenance and our pleasure. But recently, research has shown that the eating habits of the average Americans may be dangerous to future health.
The foods Americans now choose are oftentimes too rich in calories and fats, so this article reports a new study: Diet and Health, Implications for Reducing Chronic Disease Risk.
The study, conducted by the National Research Council's committee on Diet and Health, concludes that balancing nutrition, calories and activity is key to enjoying a long and healthful life.
The report recommends that most Americans increase physical activity to a moderate level and make changes in food choices
and calories intake to maintain ideal weight. Most of us --- even those of us at ideal weight --- need to eat less fat so that no more than 30% of our daily calories will come from fat.
That means cutting down on red meat and whole milk dairy products. Indeed , eat fish, chicken without skin, lean meats, and low-fat and no-fat dairy products.
The report of the Committee on Diet and Health recommends we eat five or more 1/2-cup servings of vegetables and fruits daily --- especially green and yellow vegetables and citrus fruits.
Eating more fruits and vegetables doesn't have to mean increased calories intake. Many plant foods are nutrient-rich: they provide many vitamins and minerals for very few calories
Nutrient-rich foods are particularly important for Americans over age 50. As we become older, we need to eat less because our bodies need fewer calories to function properly. But we still need full measures of vitamins and minerals to release the energy in our foods and make us feel strong and healthy.

饮食有一个良好的生活和健康
粮食让我们还活着.这是我们生存和我们很高兴.但是最近的研究显示,饮食习惯的平均美国人可能是危险的未来的健康.
美国人的食品现在选择的往往过于丰富的热量和脂肪,因此这条报道一项新的研究：饮食与健康,减少影响慢性病危险.
这项研究进行的全国研究理事会委员会的饮食和健康,得出结论认为,平衡的营养,热量和活动的关键是享受一个长期和健康的生活.
该报告建议,大多数的美国人增加身体活动,以温和的水平和改变食物的选择
和卡路里摄取量以维持理想体重.我们大多数人---即使是那些我们在理想体重---需要少吃脂肪,使不超过30 ％的每日热量来自脂肪.
这意味着削减红色肉类和全脂牛奶奶制品.事实上,吃鱼,鸡没有皮肤,瘦肉和低脂肪和无脂肪奶制品.
委员会的报告,关于饮食和健康建议我们吃五年或五年以上1/2-cup份蔬菜和水果每天---尤其是绿色和黄色蔬菜和柑橘类水果.
多吃水果和蔬菜并不一定意味着更多的卡路里摄取量.许多植物食品营养丰富的：他们提供了许多维生素和矿物质的热量非常少
营养丰富的食物是特别重要的美国人50岁以上.正如我们成为老年人,我们需要减少食量,因为我们的身体需要更少的热量能够正常运作.但是,我们仍然需要充分措施的维生素和矿物质,释放的能量在我们的食物和使我们感到强大和健康.