剑桥词典a long , difficult word, or a word that expresses a serious or important idea 大词；又长又艰深的词汇；表达严肃或重要概念的字眼 He tried to impress his teachers by using big words in all his essays . 他在所有的作文中，都试图用大词来给老师留下好印象。 返回 big word