He paid the taxi driver in ruble.
他用卢布付了出租车司机的费用。
The price of the souvenir was 500 ruble.
这个纪念品的价格是500卢布。
I exchanged my dollars for ruble at the bank.
我在银行把美元兑换成了卢布。
The value of the ruble fluctuates against the dollar.
卢布的价值相对于美元波动。
She saved every ruble she earned from her job.
她把工作赚来的每一卢布都存了起来。
