once and again

• 一而再； 再三

once and again的用法和样例：

例句

1. His mind sagged round and round on the same track.
   他的念头一而再再而三地在一条轨道上转着。
2. 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.
   冲浪者纵然可以一而再，再而三地排队阻拦客轮和其它将来会出现的入侵者，但夏威夷的变革如同它的海潮一样，无可回避。
3. We will consider the problem over and over again.
   这个问题我们还需再三斟酌。
4. I've had to chase the Gas Company up again about the cooker.
   我不得不再三要求煤气公司派人来修理煤气炉。