不
先理解核心含义，再看它在真实句子里的用法。
不；无
No learner guide for this sense
该词性缺少可信的词典依据，暂时无法生成学习内容。请选择其他词性。
Use an- naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
Dictionary facts from ECDICT.