1、The Olympics is a quadriennial event that brings athletes from around the world together.
奥运会是一个每四年举办一次，汇聚了来自世界各地的运动员的盛事。

2、The presidential election in the United States is a quadriennial event that determines the country's leader for the next four years.
美国总统选举是一个每四年一次的盛事，决定了该国未来四年的领导人。