单词	喷气鼓风机
释义	喷气鼓风机jet blower
随便看	negative converter negative cooperativity negative copy negative corona negative correction negative corrections negative correlation negative cover negative crystal negative--crystal negative current negative cut off grid voltage negative cutting 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