“辅币”怎么读？

“辅币”的英语可以翻译为：fractional currency，fractional money，bit，change ...

他买了一些乘地铁用的辅币.He bought some tokens for the subway.面值十分的辅币比五分面值的辅币小, 虽然价值双倍.The 10 - cent coin is smaller than the 5 - cent coin, although it is worth twice as much.你在入口处那儿把辅币塞进投币孔.You slip the token into the slot at the ...