a burning question的用法和样例：
- Slavery was now becoming a burning question in American politics.
- Whether the president has taken bribes or not is a burning question in the university.
- It is a burning question that how to make a scientific, definite and effective product strategy to let the company hold definite and long term orientation of product development.
- He was trapped in a burning house.
- She felt a burning animosity towards them.
- The burning question is, can Lyon overcome United?