•Our new managing director has reorganized the company a bit, but nothing has fundamentally changed/altered (= its basic character has not changed).我们的新总裁对公司进行了一些重组，但没有甚么根本性的变化。

•I still believe that people are fundamentally good.我仍然认为人性本善。

•I disagree fundamentally with what you're saying.我完全不同意你所说的。