该原则对解决这一悖论至关重要。

The principle is ___pivotal for resolving the paradox.

他的建议在这个项目中起到了关键作用。

His advice was ___pivotal to the success of this project.

这个关键决定将影响整个项目的成败。

This ___pivotal decision will determine the success or failure of the entire project.