bank up

例句：

1. 1. We need to bank up our savings for a rainy day.
   我们需要为雨天存些钱。
2. 2. The bank has raised interest rates, so your savings will be bank up.
   银行提高了利率，你的存款将有所增加。
3. 3. She decided to bank up her savings for a new car.
   她决定将她的积蓄用于购买新车。