thresholds阈值thresholdn.门槛；开端；界限；入口threshold stimulus阈刺激,阈刺激物,阈剌激threshold learning阈值学习threshold velocity[地物]阈流速Threshold interval阈值区间threshold decision门限判决threshold reaction阈反应threshold division阈值分割threshold analysis阈限分析,临界分析thresholds of pain痛阈； 刺痛阈threshold dividend按比例分红