期末考试不及格对我来说是一个令人非常失望的打击。

Failing the final exam was a ___bitter disappointment for me.

通过惨痛的经历，她了解到他是不可信的。

She learned through ___bitter experience that he was not to be trusted.

如今，我已经从这次惨痛的经历中恢复过来了。

Now, I've already recovered from this ___bitter experience.