a free fall display的用法和样例：
- The stock price is falling like a free fall.
- But newspapers, perhaps the ultimate trophy asset even as the industry appears to be in a free fall, may be too much even for previously successful business executives.
- Crude-oil prices sank below $50 a barrel, and the average cost of a gallon of gasoline at the pump hovered just above $2, a free fall in prices that is reverberating through the economy.
- Jon sent away for a free almanac.
- A free flow of water came from the pipe.