adj.不能变更的，不变的

An unalterable truth stands firm, immune to any attempt at modification.
一个不变的真理坚不可摧，不受任何修改尝试的影响。
The law of nature is immutable; it cannot be changed by human will.
自然法则亘古不变，无法被人类意愿所改变。
His unalterable determination inspired his team to achieve greatness.
他坚定不移的决心激励他的团队走向卓越。
The constitution is an unalterable document, enshrining the country's fundamental principles.
宪法是不可更改的文件，它确立了国家的基本原则。
The diamond's molecular structure makes it an unalterable element under normal conditions.
钻石的分子结构使其在正常条件下保持不变。
She wore an unalterable smile, hiding the turmoil within her heart.
她脸上挂着不变的笑容，掩饰内心的纷扰。
The stars in the night sky are an unalterable reminder of the vastness of the universe.
夜空中恒星的不变性提醒我们宇宙的浩渺无垠。
His unalterable loyalty to his family was unwavering through thick and thin.
他对家人的坚定不移的忠诚无论顺境逆境都未曾改变。
The unalterable laws of physics govern the functioning of our world.
不变的物理定律掌控着我们的世界运行规则。
Her resolve was as unalterable as the mountains, nothing could shake it.
她的决心坚如磐石，任何事情都无法动摇。