acterisfic various income social stratum的用法和样例：
- Considered that borrower's different credit, should separate the low income social stratum the house leasing market and rents inexpensively the market.
- In w estern counties such as USA, resolving the housing problems of low incoming social stratums has been probed and developed for tens of years, up to now it is more perfect.
- On Middle Income Social Stratum
- In our country, a social stratum with high income, which is newly emerging after opening and reforming, possesses eight features.