1. C 错觉，幻想，错误观念　 a false idea, especially about oneself
2. C 假象　 sth seen wrongly, not as it really is

　cast away ～s　丢掉幻想
　dispel an ～　消除幻想
　hold an ～　抱有幻想
　shattered ～　破灭的幻想
　sweet ～　甜蜜的幻想
　optical ～　错觉
　without any ～　没有任何幻想
　～ about sth　对某事的幻想
　～ of good health　对健康的错觉

　The sun appears to go around the Earth, but this is an illusion.　太阳看起来好像绕着地球转，但这只是个错觉。
　The illusions of youth fade with maturity.　青少年时期的幻想随着成熟而消失了。
　He cherished the illusion that she loved him, but he was wrong.　他抱有她爱他的错觉，但他错了。
　The mirrors all around the walls give an illusion of greater space.　墙壁周围的镜子造成一种较大空间的假象。

 ♣ be under an〔the〕 illusion
　有错觉，误以为　believe wrongly
　They were under the illusion that the company was doing well.　他们误以为该公司生意很好。
 ♣ have no illusions about
　对…不抱幻想　be fully conscious of the true nature of sth
　I have no illusions about his ability.　我对他的能力不抱任何幻想。

 ♣ illusion, mirage
　这两个词都指“幻觉，幻想”。illusion指出现在脑海里的错觉；而mirage多指根本不能实现的想法，更常指海市蜃楼。

　［词源］拉丁语illusio（欺骗，幻想）