Threshold H阈值Hthresholdn.门槛；开端；界限；入口threshold odour number阈臭数, 气味阈值threshold coefficients门限系数threshold value method阈值法threshold de-noising阈值去噪threshold logic device阈逻辑器threshold signal level门限信号电平Threshold verification门限验证threshold cryptosvstem门限密码体制threshold cryptosystem门限密码体制threshold flow density阈值流量密度,阈值通量密度