noun 下载 🔗分享 非必需品,可有可无的东西 Something that is not essential. Examples : "The student focused on the essential subjects, but spent little time on the nonessentials. " 这个学生专注于必修科目,却很少花时间在非必需品上。 item thing business economy 与AI对话词汇游戏阅读练习