once and again的用法和樣例：
例句
- His mind sagged round and round on the same track.
他的念頭一而再再而三地在一條軌道上轉著。 - Surfers can line up again and again to block the ferry and other harbingers of the future.But change is as inevitable as the tide.
衝浪者縱然可以一而再，再而三地排隊阻攔客輪和其它將來會出現的入侵者，但夏威夷的變革如同它的海潮一樣，無可迴避。 - We will consider the problem over and over again.
這個問題我們還需再三斟酌。 - I've had to chase the Gas Company up again about the cooker.
我不得不再三要求煤氣公司派人來修理煤氣爐。
