讽刺的是，他现在退休了，却比以往任何时候都忙。

The ___irony is that now he's retired, he's busier than ever.

这个情境的讽刺之处在于，她与他们同住，却直到最后才意识到真相。

The ___irony of the situation is that she lives with them but never realizes the truth until the end.

一个苦涩的讽刺是，消防站失火了，而消防员们正在罢工。

It's a bitter ___irony that the fire station burned down while the firefighters were on strike.