The Olympic Games take place once every four years.

10奥林匹克运动会每4年举行一次.

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A leap year occurs once every four years.

每四年才有一次闰年.

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Annie: Yes. The Olympic Games is held once every four years. The opportunity is rare.

安妮: 对了,四年一届的奥运会, 机会多么难得呀.

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It is held once every four years, and it last for 16 days.

每四年举行一次, 与奥运会相间举行.会期规定为16天.

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