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39页（227字）
形容非常专心努力，例为了早日求得研究结果，他日夜进行实验，几乎达到废寝忘食的地步。
In order to get an early result from his experiment，he worked day and night and was so absorbed that he almost forgot to eat and sleep．