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》

To average people, they often tend to live under the illusion that English often means a good opportunity for one's career, is this really the case?

对于一般人来说，他们常常以为掌握英语就意味着一份好的工作，然而这是真的吗？

youdao

Even if that better future is often an illusion, optimism has clear benefits in the present.

即使更好的未来常常只是幻想，乐观主义在当前也有明显的益处。

youdao

One day you might look up and see meplaying the game at 50, because limits like fears are often just an illusion."

VOA: standard.2009.12.24

Proximity often creates illusion of knowledge.

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Last season, his Porto team played a sophisticated and at times mesmerizing tactical system, with players interchanging effortlessly and often giving the illusion of having extra bodies on the pitch.

WSJ: Andre Villas-Boas: The Collapse of a Coaching Wunderkind

There are potential lessons to be learned that are often not heeded, in part, because of that contrived illusion of distance throughout recorded human history.

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