1. The exchange rate for the boliviano against the US dollar has been fluctuating over the past month.
（在过去的一个月里，玻利瓦尔兑美元的汇率一直在波动。）

2. When traveling in Bolivia, make sure to have some bolivianos on hand for small purchases.
（在玻利维亚旅行时，准备一些玻利瓦尔备用以支付小额购物。）