cost correlation

例句：

1. 1. The cost of the new car is too high for us to afford.
   这辆新车的价格太高了，我们买不起。
2. 2. They spent a lot of money on their vacation.
   他们在假期上花了很多钱。
3. 3. The cost of living in this city is very high.
   在这个城市生活的成本很高。