| 单词 | aftertreatment | 
| 释义 | Word Frequency aftertreatment(ˈɑːftəˌtriːtmənt) noun 1.  a.  a method or device for reducing harmful emissions from internal-combustion engines before they are released into the atmosphere, for example a filter or a catalytic converter   This particular filter, introduced in 2007, will be the only aftertreatment requiredfor heavy-duty engines in 2010. b.  (as modifier)  an aftertreatment system 2.  medicine  additional treatment that is given to a patient following an illness or medical procedure  3.  textiles a chemical treatment that is applied to a fabric immediately after it has been dyed, in order to make it more colour-fast | 
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