a hefty year-on-year rise of的用法和样例：
- The dead are burried in the desert year on year.
- Spending has increased year on year.
- A hefty serving of mashed potatoes; received a hefty bonus.
- The produce price such as wheat of the Anhui province, early rice, semilate rice, corn was compared 2003 on year rise 5.620% differ.
- The film also contains a hefty dose of comedy.