There are fundamental differences between your religious beliefs and mine.
你我的宗教信仰根本不同.
If you two are going to marry, I advise that you need to know the fundamentals of cooking.
如果你们要结婚的话,我建议你们了解烹调的基本知识。
A knowledge of economics is fundamental to any understanding of this problem.
经济知识对于理解这个问题是至关重要的。