基本解释弃引时间同根派生 英汉例句It is worthy attention was that the change of GSH-PX activity had a lagtime to the change of selenium concentration. 值得注意的是酶活性的变化总滞后于硒浓度的变化。Keywords Pulsatile drug delivery system;Lagtime;Preparation; 关键词脉冲给药系统;时滞;制剂;