单词	原山道年
释义	原山道年 yuán shān dào nián norsantonin
随便看	negatived negative damping factor negative dc disconnect switch negative debt negative declaration negative definite negative definite form negative definite function negative definite hermitian matrix negative definite matrix negative definiteness negative definite quadratic form negative definition negative delta negative demand negative dendrite negative detector negative detector power supply board negative detector signal discrepancy alarm negative development negative deviation negative diageotropism negative dictionary negative differential conductance negative differential drift velocity