ADJ Something that remains unaltered has not changed or been changed. 未(曾)改变的
The rest of the apartment had fortunately remained unaltered since that time.
从那时起公寓的其余部分就幸运地未曾改变过。
Indeed, unaltered shells of marine invertebrates are known from deposits over 100 million years old.
事实上，海洋无脊椎动物不变的外壳是通过1亿年前的沉积物发现的。
This practice has remained unaltered for centuries.
这种习俗已数百年未变。
The rest of the apartment had fortunately remained unaltered since that time.
从那时起公寓的其余部分就幸运地未曾改变过。
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