mass noun
- disappointment resulting from the discovery that something is not as good as one believed it to be幻灭, 失望。
with obj.
- cause (someone) to realize that a belief they hold is false使信念破灭：
if they think we have a magic formula to solve the problem, don't disillusion them.
如果他们认为我们有可以解决问题的神奇方案, 别使他们失望。