adj.不可更改的，无法改变的

The laws of nature are unalterable; they cannot be changed by human will.
自然法则不可改变，不能被人类意志所更改。
An unalterable truth is one that remains constant and universally acknowledged.
不变的事实是那些始终如一且被普遍承认的事物。
His resolve was unalterable; nothing could persuade him to change his mind.
他的决心坚如磐石，任何事物都无法说服他改变主意。
The unalterable bond between siblings is a testament to the power of love and loyalty.
兄弟姐妹之间牢不可破的关系，彰显了爱和忠诚的力量。
The unalterable schedule left no room for flexibility in our plans.
不可改变的时间表使得我们的计划毫无余地可变通。
Her unalterable beauty stood out among the crowd, drawing everyone's attention.
她无可挑剔的美貌在人群中独树一帜，吸引着所有人的目光。
The ancient ruins remain unalterable, a silent witness to the past.
古老的遗迹依旧屹立不倒，无声地见证着过往的历史。
The constitution is an unalterable document, guaranteeing the fundamental rights of citizens.
宪法是一份不可更改的文件，确保公民的基本权利。
Despite the hardships, his determination to succeed was unalterable.
尽管面临困难，他坚持成功的决心毫不动摇。
Unalterable patience is the key to achieving long-term goals.
坚定不移的耐心是实现长期目标的关键。