negative gap负差额,逆缺口negativeadj.否定的；消极的；负面的；负的n.否定；反面意见；底片；[数]负数vt.否定negative stiffness model负刚度模型negative view of freedom消极自由观negative resistance tube负阻管negative pressure slider负压磁头浮动块Negative for tumor cells无肿瘤细胞Negative pressure faucet负压旋塞negative to an applicant给申请者的否定回答negative pressure device负压呼吸器negative external effect负外部性negative surface tension负表面张力