详细解释:n. 否定, 反面, 不存在
【医】 否定, 否认
词型变化：
形容词:negational英语解释：
名词 negation:
a negative statement; a statement that is a refusal or denial of some other statementthe speech act of negating(logic) a proposition that is true if and only if another proposition is false例句：
The author boxed the compass of negation in his article.该作者在文章中依次探讨了各种反面的意见。