thresholds阈值thresholdn.门槛；开端；界限；入口threshold dosimeter[化] 阈值剂量计threshold reduction阈值减低threshold condition阈状态,阈值条件threshold agreement界限协议threshold indicator门槛目标；基本目标；最低指针threshold signature门限签名threshold operation阈值操作, 阈值运算threshold parameter阈值参数threshold adjusting阈值调节threshold de-noise阈值去噪