thresholdn.门槛；开端；界限；入口threshold rule最低得票规则threshold depth阈限深度,海槛深度threshold plate门坎铁板threshold model阈值模型,阈模型threshold curve(听)阈曲线, 听力曲线threshold drift阈漂移,暂时性阈移,听阈漂移threshold trait阈值特征threshold level门限信号电平,门限电平,阈电平,阈值电平threshold speed阈流量threshold power阈值功率,极限功率