For the more fortunate, it’s only the feeling in your stomach that says “it’s time to eat.” If you are less fortunate and don’t get enough to eat each day, hunger makes you feel weak, tired, unable to concentrate, even sick. All you can think about is when you are going to eat next. For hundreds of millions of people worldwide, this feeling lasts all day, every day, except they never know if and when this feeling will go away. For them, hunger can lead to illness and temporary or permanent damage to their health. They have insufficient food to keep them active and healthy, and they don’t get all the vitamins and minerals the body needs to function well. This is chronic hunger. When hunger is extreme and after days of insufficient or no food, the body begins to feed on the only thing it can: itself. It breaks down its own fat and body tissues, which eventually leads to starvation and death.

http://www.1billionhungry.org/hunger/what-is-hunger/

                                                               什么是饥饿？

    对那些较为幸运的人来说，饥饿只是他们胃中那种“该是吃饭的时间了”的感觉。而对那些不那么幸运而且每天都吃不饱的人而言，饥饿使他们感觉虚弱疲惫，注意力不集中，甚至像病了一般。此时，他们心里所想的只是什么时候才能吃到下一顿。全世界有数百万人整天怀有这种感觉，只是他们永远都不清楚这种感觉会不会消失或者这种感觉何时才能消失。对他们而言，饥饿会导致疾病和暂时的甚至永久的身体破坏。他们没有足够的食物来保持自身的健康，他们不能获取足够的身体所需的维生素和矿物质，这是一种慢性饥饿。当数日不能获取足够的食物或者没有食物时，饥饿达到极限，身体开始依靠它唯一的东西—身体自身来维持生命，于是，开始分解体内的脂肪和身体组织，最终导致饥饿并死亡。