没日没夜 day and night
Explanation
指不分白天黑夜，形容连续不断地工作或学习。
It means without distinction between day and night, to describe continuous work or study.
Origin Story
在一个偏僻的小山村里，住着一位勤劳的农夫老李。老李家境贫寒，为了养活一家老小，他每天起早贪黑，辛勤劳作。春耕秋收，他总是没日没夜地忙碌在田间地头。即使是刮风下雨，也丝毫不能阻挡他劳作的热情。他常常在田埂上扛着锄头，汗流浃背，却依然坚持不懈。乡亲们都夸赞老李是勤劳致富的好榜样。秋收时节，老李家的田里稻穗沉甸甸的，丰收的喜悦洋溢在老李一家人的脸上。他们知道，这一切都是辛勤劳作的成果，是老李没日没夜的努力换来的。 然而，有一天，老李突然病倒了。他躺在床上，看着屋外忙碌的景象，心里充满了愧疚。他觉得自己对家人的关心太少了，为了生计，他忽视了身体健康，忽视了家庭的温暖。这次病倒，让他意识到，健康比什么都重要，家庭的和谐也比任何财富都珍贵。从那天起，老李调整了自己的生活方式，不再像以前那样没日没夜地劳作了。他把更多的时间用来陪伴家人，关心家人。即使工作再忙，他也会抽出时间来锻炼身体。老李的生活变得更加充实、更加快乐。
In a remote mountain village, there lived a hardworking farmer named Lao Li. Lao Li's family was poor, and to support his family, he worked hard every day from early morning till late at night. During spring plowing and autumn harvest, he was always busy in the fields day and night. Even strong winds and heavy rain could not deter his enthusiasm for work. He often carried his hoe on the field ridge, sweating profusely, but he still persisted. The villagers praised Lao Li as a good example of diligence and wealth. In the autumn harvest season, the rice ears in Lao Li's fields were heavy, and the joy of harvest was overflowing on the faces of Lao Li's family. They knew that all this was the result of hard work, the result of Lao Li's day and night efforts. However, one day, Lao Li suddenly fell ill. He lay in bed, looking at the busy scene outside, his heart full of guilt. He felt that he had cared too little for his family, and for the sake of his livelihood, he had neglected his health and the warmth of his family. This illness made him realize that health is more important than anything else, and the harmony of the family is more precious than any wealth. From that day on, Lao Li adjusted his lifestyle and no longer worked day and night as before. He spent more time with his family and caring for them. Even when he was busy with work, he would take time to exercise. Lao Li's life became more fulfilling and happier.
Usage
用于形容人连续不断地工作或学习，不分白天黑夜。
Used to describe a person working or studying continuously without distinction between day and night.
Examples
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为了赶项目进度，他没日没夜地加班。
wèile gǎn xiàngmù jìndù, tā méi rì méi yè de jiābān
To catch up with the project schedule, he worked day and night.
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她为了照顾生病的孩子，没日没夜地守护在床边。
tā wèile zhàogù shēngbìng de háizi, méi rì méi yè de shǒuhù zài chuáng biān
She stayed by her sick child's bedside day and night.
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考试在即，学生们没日没夜地复习功课。
kǎoshì zài jí, xuéshengmen méi rì méi yè de fùxí gōngkè
With the exam approaching, the students reviewed their lessons day and night.