1. That was the nadir of her career, she couldn't imagine things getting any worse.
那是她职业生涯的最低点，她无法想象事情会变得更糟。

2. After hitting rock bottom, he slowly climbed out of the nadir and started to rebuild his life.
在触底之后，他慢慢地从最低潮中走了出来，开始重新建设他的生活。