a year-on-year increase in spending的用法和样例：
- TROX China has a good future with a year on year of 35% increase in our sales volume.
- You may have to spend over a year on your book.
- He may have to spend more than a year on his book.
- Most rock groups spend two or three months a year on the road.
- Spending has increased year on year.
- The dead are burried in the desert year on year.