孩子的安全必须是首要考虑因素。

The child's safety must be the ___overriding consideration.

这条高架公路横跨整个城市。

The ___overriding highway spans across the entire city.

校长行使了他的最高权限，否决了教学委员会的提议。

The principal used his ___overriding power to reject the teaching committee's proposal.