出处：按学科分类—语言、文字 中国对外翻译出版公司《汉英成语词典》第45页（232字）
形容精神饱满旺盛，例为赶进度夜以继日长时辛苦工作后，大家均已疲惫不堪，他却依然神采奕奕，干劲十足。
After long hours of hard work to make up for lost time，everyone was dead beat except for him．He was as energetic and strong as ever．