oscillating period造句

例句与造句

1. Those who subscribe to the climate-change theory of the extinctions argue that the driving force behind them was the destruction of habitat brought about by oscillating periods of warmth and cold during the Pleistocene era, the era of on-and-off glaciation that began about a million years ago.
2. It's difficult to find oscillating period in a sentence. 用oscillating period造句挺难的