illusion

一个小小的瑕疵就能打破完美的幻象。

A single flaw can shatter the ___illusion of perfection.

我们没有任何幻想——我们知道这项工作很危险。

We are not under any ___illusion - we know the work is dangerous.

我曾错误地认为公交服务非常可靠。

I was under the ___illusion that the bus service was very reliable.