同归于尽 Together they perish
Explanation
“同归于尽”指的是双方都死亡或一同毁灭。这个成语通常用于形容战争、冲突或其他极端情况下的结局，也用来形容某种行为或做法导致的结果，即双方都没有好结果。
"Together they perish" refers to both sides dying or being destroyed together. This idiom is usually used to describe the outcome of war, conflict, or other extreme situations. It is also used to describe the results of certain actions or practices, namely that both sides have no good results.
Origin Story
传说在古代的战国时期，魏国和赵国为了争夺土地而发生了一场旷日持久的战争。战争双方都损失惨重，但谁也不肯退让，最终两国都因为这场战争而走向了灭亡。这场战争被称为“长平之战”，这场战役不仅导致了魏国和赵国的国力衰败，也让整个战国七雄的格局发生了重大的改变。这场战役，以魏国和赵国“同归于尽”而告终，成为中国历史上著名的战争案例。
Legend has it that in ancient China during the Warring States period, the state of Wei and the state of Zhao fought a long and drawn-out war over land. Both sides suffered heavy losses, but neither was willing to give in, ultimately leading both states to their demise. This war was known as the
Usage
这个成语多用于形容战争、冲突或其他极端情况下的结局，也用来形容某种行为或做法导致的结果，即双方都没有好结果。
This idiom is often used to describe the outcome of wars, conflicts, or other extreme situations. It is also used to describe the results of certain actions or practices, namely that both sides have no good results.
Examples
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两军对峙，最后同归于尽，造成了惨重的伤亡。
liang jun dui zhi, zui hou tong gui yu jin, zao cheng le can zhong de shang wang.
The two armies confronted each other and finally perished, resulting in heavy casualties.
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为了保护国家利益，他们宁愿同归于尽，也不愿屈服于侵略者。
wei le bao hu guo jia li yi, ta men ning yuan tong gui yu jin, ye bu yuan qu fu yu qin lue zhe.
To protect the interests of the country, they would rather perish than submit to the invaders.