出生入死 to risk one's life
Explanation
这个成语形容为了某项事业，不惜牺牲生命，奋不顾身。
This idiom describes selfless dedication to a cause, even at the risk of one's own life.
Origin Story
秦汉时期，有个名叫李广的将军，他一生征战沙场，出生入死，为保卫国家立下了汗马功劳。有一次，李广率军出征，与匈奴人作战。战斗异常激烈，匈奴人凶猛异常，李广的士兵伤亡惨重。但李广却毫不畏惧，他带领着士兵们浴血奋战，最终取得了胜利。李广出生入死，勇猛无畏，他的事迹被后人传为佳话。
During the Qin and Han dynasties, there was a general named Li Guang who spent his whole life fighting on the battlefield, risking his life to defend the country. He made great contributions to his country. Once, Li Guang led his troops on a campaign against the Xiongnu. The battle was extremely fierce, the Xiongnu were very ferocious and many of Li Guang's soldiers were killed. But Li Guang was not afraid, he led his soldiers into battle and they finally won the victory. Li Guang risked his life and was fearless, his deeds were passed down through the ages.
Usage
这个成语用于赞扬那些为人民、为国家、为事业而英勇无畏的人，表达对他们的敬佩之情。
This idiom is used to praise those who are brave and fearless for their people, their country, or their cause, to express admiration for them.
Examples
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为了人民，他们出生入死，奋战在抗疫一线。
wèi le rén mín, tā men chū shēng rù sǐ, fèn zhàn zài kàng yì yī xiàn.
They risked their lives, fighting on the front lines of the epidemic, for the people.
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在战争年代，无数战士出生入死，保家卫国。
zài zhàn zhēng nián dài, wú shù zhàn shì chū shēng rù sǐ, bǎo jiā wèi guó.
In times of war, countless soldiers risked their lives to defend their country.
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为了完成任务，他们出生入死，克服了重重困难。
wèi le wán chéng rèn wù, tā men chū shēng rù sǐ, kè fú le chóng chóng kùn nan.
They risked their lives to complete the task and overcame countless difficulties.