a year-on-year increase of的用法和样例：
- TROX China has a good future with a year on year of 35% increase in our sales volume.
- They get together once a year on Christmas Day.
- The number of couples getting married also increased last year, with 9.45 million marriages registered nationwide, an increase of 1.2 million year on year, the report said.
- You may have to spend over a year on your book.
- He may have to spend more than a year on his book.
- He spends about 1 000 yuan a year on travelling.