原级：certainty
1. Both the Olympics and the experience of their audience are increasingly shaped by technology, which has begun to exert a profound impact on our ontological certainties.
2. Understanding the certainties and unknowns of the nation's new growth model is essential for success in China.
3. " I'm dealing in certainties and the certainty is he's here tonight, " Carlisle said.
4. Few people deny there are many uncertainties ahead, but one of certainties is that the global recovery will be slower than most expected.