化学中毒 meaning in English

chemical intoxication
chemical poisoning

However , this dissertation mainly focuses on diesel catalyst aging mechanism including heat deterioration and performance degradation caused by toxic substance . following the above conclusions , a fast aging test cycle is produced which consists of three stages
论文的主体分析了柴油机氧化催化剂的老化机理，主要是热失活和化学中毒老化，研究了我国主要几种柴油机的排气温度特性，并在催化剂老化机理基础上提出车用柴油机氧化催化器快速老化试验循环，即三段式老化循环。