defile：（文或修辞）
make sth dirty or impure 使某物肮脏或不纯
We respect the faith of Islam, even as we fight those whose actions defile that faith.
美国尊重伊斯兰教的教义，并与玷污伊斯兰教的教义的行为作斗争。
Keep my requirements and do not follow any of the detestable customs that were practiced before you came and do not defile yourselves with them.
所以你们要守我所吩咐的，免得你们随从那些可憎的恶俗，就是在你们以先的人所常行的，以致玷污了自己。
In very severe cases, it can even defile some common objects, and in those cases, the source of impurity might have to be isolated or excluded if necessary.
在一些非常严峻的情况中，它会玷污一些普通的事物，在这种时候，不洁之源,也许只能被孤立，严重的话需要驱逐。
rivers defiled by pollution
受污染的河流
（特） march in single file or a narrow column 指部队单行或纵队前进
defilement（n）：污损，弄脏
infect：（尤用于被动语态）使某人/某物传染，感染，污染某人/某物 infect sb/sth with
The laboratory animals had been infected with the bacteria。
实验室的动物都已受到这种细菌的感染。
infection（n）：～ with sth 传染，感染
the infection of the body with bacteria
身体受细菌侵染。