impure
/ɪmˈpjuə(r); ɪm`pjʊr/ adj
1 (dated 旧) morally wrong, esp in one's sexual behaviour 道德败坏的; （尤指）淫猥的
impure thoughts, motives, actions 淫秽的想 法、 动机、 举动.
2 not clean; dirty or contaminated 不洁的; 肮脏的; 污染的.
3 not consisting of one substance,but mixed with another substance of poorer quality 不纯的; 有杂质的
impure metals 不纯的金属.