发愤忘食 meaning in English

study [work] hard, neglecting one's meals; be so immersed in work as to forget one's meals; be roused to such diligence as to forget one's meals; one studied with such eagerness that he forgot his meals.; work so hard as to forget to eat [neglect one's meals 短语和例子
有的学生有时候甚至发愤忘食。 some of the students were so immersed in their studies that they sometimes even forgot their meals