英语翻译Salt is as necessary to life as water.In many areas of A

英语翻译
Salt is as necessary to life as water.In many areas of Africa people once drank the urine（尿）of animals because they had no other source of salt.Without salt,human beings die.
The human body demands that the amount of salt in the blood always stay the same.When the body does not get enough salt,it protects itself by letting less salt leave the body in urine and sweat.But it cannot reduce this output to zero.Some salt is always escaping.On a completely saltless diet,like that of some people in Africa,the body steadily loses small amounts of salt through the kidneys (肾) and sweat glands (腺).It then tries to adjust to this loss by speeding up its secretion (分泌) of water.In this way,the body attempts to keep the amount of salt in the blood at the necessary level.The result is a slow drying up of body and,finally,death.The person dies of thirst.
In cases where there is little or no water to drink,the body tries to do the opposite thing.Again,it must keep the salt level in the blood constant.Because it has little water,it attempts to stop water from leaving the body and to increase its secretion of salt.But,as with the escaping salt,it cannot be completely successful.Some water still leaves and the person eventually dies of thirst.In short,the body’s normal needs for salt and for water are both parts of the same important need to keep the salt level in the blood constant.

像水一样,盐是生命所必需的.在许多的非洲地区人们曾经喝过动物的尿液,因为他们没有其他盐的来源.没有盐,人类将会死亡.
人体需要的大量的盐且血液中盐的含量总是保持不变.当身体不能获得足够的盐,它可以保护自己让盐少使身体于尿液和汗水.但它不能降低这种输出到零.一些盐总是要飞.在一个完全saltless一些食物,如在非洲,身体不断失去少量盐分通过肾脏(肾)和汗腺(腺).然后试图调整到这个损失由加快它释放(分泌)的水.以这个方式,身体试图保持血液中大量的盐在必要的水平.结果是一个缓慢的干涸的身体,最终的死亡.人死亡的干渴.
在某些情况下没有或者很少有水喝,身体试图要做的刚好相反的事情.再次,必须保持血液中盐摄入水平不变.因为它有少的水,它试图阻止水离开身体,增加它释放的盐.但盐分,逃跑不能完全成功.一些水里还叶子和人终究死的干渴.简而言之,身体的正常需要的盐和水是同样重要的两个部分需要保持这血液中盐摄入水平不变.