imaginary hypersphere

例句：

1. 1. The story is imaginary and not based on any real events.
   这个故事是虚构的，并非基于任何真实事件。
2. 2. She had an imaginary friend who would always be there for her.
   她有一个想象中的朋友，总是在那里陪伴她。
3. 3. The artist created a series of imaginary landscapes to inspire his work.
   这位艺术家创作了一系列的想象景观来激发他的工作灵感。