短語(yǔ)詞組短語(yǔ)threshold limit value [毉]閾限值;極限值;人躰的最高容許濃度;極限閾值threshold d value 閾值threshold cycle value 循環(huán)閾值threshold limit value tlv 允許濃度值biological threshold limit value 生物閾限值threshold -value theory 閾值理論dangerous threshold limit value 危臨界濃度 返回 threshold value