adj.难以想象的，不可想象的，难以置信的

The depths of space hold unimaginable mysteries that scientists continue to explore.
太空的深处蕴藏着科学家们不断探索的难以想象的奥秘。
The power of the human mind is unimaginable; it can create both wonders and nightmares.
人类思维的力量是难以想象的；它既能创造奇迹，也能造就梦魇。
The speed at which technology is advancing is almost unimaginable, transforming our lives in ways we never thought possible.
技术发展的速度几乎令人难以想象，以我们从未想过的方式改变着我们的生活。
The pain she felt after losing her loved one was unimaginable, a grief so profound it seemed to consume her.
失去亲人后，她感受到的痛苦是难以想象的，那种深切的悲痛似乎要将她吞噬。
The beauty of the underwater world, with its vibrant coral reefs and exotic marine life, is simply unimaginable until seen firsthand.
海底世界的美丽，有着绚烂的珊瑚礁和奇异的海洋生物，不亲眼目睹是难以想象的。
The scale of the ancient Egyptian pyramids' construction is unimaginable, considering the limited technology of the time.
考虑到当时有限的技术条件，古埃及金字塔建造的规模是难以想象的。
The kindness shown by strangers during the disaster was unimaginable, restoring faith in humanity for many.
灾难期间陌生人展现出的善意是难以想象的，为许多人重拾了对人性的信心。
The complexity of the human genome, with its billions of DNA sequences, is unimaginable, yet scientists are gradually unraveling its secrets.
人类基因组的复杂性，拥有数十亿的DNA序列，是难以想象的，但科学家正逐步揭开它的秘密。
The level of poverty and suffering witnessed in some war-torn countries is unimaginable to those living in peace and prosperity.
对于生活在和平与繁荣中的人来说，一些战乱国家所见证的贫困和苦难程度是难以想象的。
The feeling of standing on top of a mountain after a grueling climb, surrounded by breathtaking scenery, is an unimaginable sense of accomplishment.
经过艰苦攀登，站在山顶上，被壮丽景色环绕时的那种感觉，是一种难以言喻的成就感。