adj.正常以下的；普通以下的；低能的
Subnormal b-wave were seen in electroretinography. 网膜电图显示低于正常的b波。
This school is for subnormal children. 这所学校是为低能儿童开的。
He was born subnormal and will never learn to speak. 他天生低能，学不会讲话。
