a heigh dosage must be used

例句：

1. 1.I can't afford the new car.
   我买不起新车。
2. 2. The cost of living istoo high for many people to afford.
   对于许多人来说，生活成本太高，他们负担不起。
3. 3. She was able to afford aluxury apartment despite her low income.
   尽管收入低，她还是能够负担得起一套豪华公寓。