0 below an average or expected standard, especially of intelligence -- 低于正常标准的，低下的；（尤指）弱智的，低能的
mentally subnormal 心智低下的
subnormal temperatures 低于正常水平的气温
In all, a group of 27 patients was recorded at four hospitals for the mentally subnormal.
In these cases reproductive fitness may be normal or somewhat subnormal.
After age 29, only two women were still not married, both being considered unfit-one had a club foot and the other was mentally subnormal.
None of the subjects in the other groups was related, nor did any of them have mentally subnormal first-degree relatives.
It would be idle to expect of this group, most of whom are of subnormal mentality, a proper sense of social responsibility.
Additionally, the subnormal stature of cubs surviving high initial infection may place them at a competitive disadvantage as they mature.
It is not only subnormal individuals who are potentially instructive.
The left ventricular ejection fraction is commonly, but not invariably, subnormal.
