incumbent

作为父母，我们有责任确保孩子的安全。

As parents, it is ___incumbent on us to ensure our children's safety.

现任总统将在下个月发表国情咨文演讲。

The ___incumbent president will deliver the State of the Union address next month.

如果现任总统只任职一届，他们可能会寻求连任。

The ___incumbent president may seek re-election if they have only served one term.