短語詞組短語No significant risk level 無顯著風險含量significant difference level 差異顯著水平significant U level 檢驗水準constant significant level 固定顯著性水平reached extremely significant level 達極顯著水平reach significant level 達顯著水平an extremely significant level 極顯著水平very significant level 極顯著水平reached very significant level 達極顯著水平reached significant level 達到顯著水平 返回 significant level