无从知道,并不知道(做错了事)
to have no way of realizing or being aware that you have done sth wrong
'I'm sorry, I called when you were in bed.''Don't worry — you weren't to know.'“对不起,你睡觉时打电话打扰你了。” “别在意,你不是故意的嘛。”
释义来自《牛津高阶英汉双解词典》第 9 版