Never a happy topic, bed wetting is a very distressing problemfor five to seven million American kids.
尿床可是个不愉快的话题dGv[9TP,0uDIC@TYbn5。尿床困扰着500万至700万名美国儿童cgQqNhc7HS~Q+Qtpst9。
If we can't explain whysome people like to pick on these kids, can we at least shedsome light on what causes bed wetting?
如果我们无法解释为什么偏偏这些儿童尿床，那么我们至少探究下尿床的原因吧！
At one time, people punished bed-wetters for acting badly, but today scientists believe that thiscondition has several physical causes.
以前，经常尿床的儿童会被罚bSGQX52Ajj,eTBm|,M。但是，如今科学家相信尿床是基于生理因素znKY%CR[NNrZYgS。
Some kids suffer from problems like infections or anatomical defects that can be easily identified and treated.
一些儿童患常见可治愈传染病或结构缺陷e;h8#)|yIh5ILY^BXh.g。
Other causes are harder to pin down.
其它原因就很难下定论了NzEspDhpG3|NhHt。

One promising area of research is on the kidney hormoneADH.
有种可行性研究的方向是肾脏激素：抗利尿激素+9PAJ+3UP%B!0V6c。
We all produce more ADHhormone at night.
夜晚人体分泌的抗利尿激素较多yc_NW37y=q09。
ADH signals the kidney toslow down production.
抗利尿激素向肾脏发出减慢新陈代谢的信号h,w)lcd-i5N3。
This is why we don't go to the bathroom for eight hours at night but couldnever last that long between bathroom breaks during the day.
这是为什么我们夜晚八小时不上厕所，但是白天上厕所的间隔时间却更短dEEfEIMiCj|Q,y。
Some children who wet their bedsdo not produce enough ADH at night.
一些儿童尿床是因为夜晚没有分泌足够的抗利尿激素8T=~;jC.xXa。
When given drugs that boost this hormone, they stopbed wetting.
服用药物促进抗利尿激素分泌就可以治疗儿童尿床GXZBJlDgpF。
Finally, some kids simply have small bladders and an undeveloped nervous system.
另外，有些儿童尿床仅仅是因为膀胱小且神经系统发育不完善xD|Rdwgg)!5Vs^2DW。
The goodnews is that these kids, like most bedwetters, will grow out of it as their bodies develop andmature.
可喜的是随着身体机能的发育和成熟，大多数尿床儿童不再尿床.goj4oNSj)V9D9+。