单词	positive definite
释义	positive definite adjective 1 : having a positive value for all values of the constituent variables positive definite quadratic forms 2 of a matrix : having the characteristic roots real and positive Word History First Known Use 1904, in the meaning defined at sense 1
随便看	brake job brake lining brake meter brake pad brake parachute brake pipe brake van brake/valve job brakeages braked brakeless brakeload brakeman brakemen braken braker brakes brakesman brakesmen brakey brakie brakier brakiest braking Brakpan

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