illusion
n. 错觉，幻觉；幻想，错误的观念
复数 illusions
例句
Mirrors in a room often give an illusion of space.
房间里的镜子常给人一种空间增大的错觉。
《牛津词典》
The idea of absolute personal freedom is an illusion.
绝对个人自由的观念是一种幻想。
He could no longer distinguish between illusion and reality.
他再也分不清幻想与现实之间的区别了。
