in ignorance ofpreppreposition: Relates noun or pronoun to another element of sentence--for example, "a picture of John," "She walked from my house to yours."
(not knowing, not being aware of)
对…无知 duì wú zhī
对…不了解 duì bù liǎo jiě
对…不了解 duì bù liǎo jiě
Being in ignorance of the law is no excuse for breaking it.