摘要：Sodium electrolytes in the body become diluted，体液内钠含量降低电解质失衡。

英语。

Sodium electrolytes in the body become diluted，体液内钠含量降低电解质失衡。

causing cells to swel，导致细胞水肿。

In severe cases，the kidneys can't keep up with the resulting volumes of dilute urine.在极端情况下肾脏承受不了稀释尿容积急剧上升。

Water intoxication then occurs.这时候人就水中毒了。

and in a rare instances，seizures or death.它有可能会引起头痛和呕吐。

But that's a pretty extreme situation.极少数情况下甚至引发癫痫或导致死亡。

On a normal day to day basis，日常生活中。

maintaining a well hydrated system is easy to manage.对于我们这些有幸获取干净饮用水的人来说。

for those of us fortunate enough to have access to clean drinking water.保持身体系统水分充足还是很容易的。

For a long time，conventional wisdom said that we should drink 8 glasses a day.长久以来传统健康观念都认为我们一天该喝八杯水。

That estimate has since been fine-tuned.那个估量后来被微调了。

来源：古今中外美文欣赏 中学英语高级教师