n.碱式硝酸盐
He was born subnormal and will never learn to read.
他天生智力低下,永远无法学会阅读.
She attended a school for the educationally subnormal.
她在一所智障学校上学。
Every normal operator is trivially subnormal.
每一个正规算子显而易见地是次正规的.
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