单词	衰年
释义	衰年 shuāiniándecline of life
随便看	positive science positive section positive selection positive self-regard positive semi-definite positive semidefinite positive semidefinite form positive semidefinite kernel positive semidefinite matrices positive semidefinite matrix positive semi-definiteness positive semidefinitness positive sense positive sense class positive-sense strand positive sensitizer positive separation positive sequence positive sequence component positive sequence impedance positive sequence network positive-sequence polyphase system positive sequence reactance positive sequence resistance positive sequence short-circuit current