a business investment的用法和样例：
- He put the telephone bill down as a business cost.
- He has no idea of how to run a business.
- Mr Grate just entered on a business career.
- The North Koreans hoped a few years ago to create a busy investment zone on their side, but all they have is a shabby town of mostly idle factories.
- A business must stay in the black to keep on.
- My wife anticipates all my needs each time I come back from a business trip.