agent

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【词性】：n．

【释义】：

❶ 剂，药剂❷ 动因，因子

allergic agent过敏源

antiallergic agent抗过敏药

antifebrile agent清热药

drying agent干燥剂

emetic agent催吐药

expectorant agent祛痰剂

treat the malignant disease with poisonous

agents以毒攻毒

wetting agent润湿剂

Wind is the first agent of the exogenous pathogenic factors to cause diseases．风是外邪致痛的首位动因。