positive arc正弧
positiveadj.积极的;肯定的;明确的;正面的;正数的;阳性的n.正面;正数;正片;[语]原级
positive income effect积极所得效果
positive spike pattern正峰型(脑电图)
positive Cotton effect正考顿效应
positive voltage relay正序电压继电器
positive affer-image正后象
positive salvage value清算价值
positive feedback link正反馈链
positive-geared feed压力进给
positive definite form正定型
positive recommendation积极的忠告