a collapse in tourism的用法和样例：
- Vermiculite tends to collapse in a short time.
- China is a vast land, rich in tourism resources.
- The US current account deficit is due to a collapse in US net saving rather than an increase in investment.
- The immediate causes are plain enough: destocking on a huge scale and a collapse in exports.
- There is talk that the market is being overbuilt and a collapse in rates is forthcoming.