These jobs are hostage to the fluctuating credit card debt of local consumers .
这些职位受到当地消费者不断波动的信用卡债务的制约。
Carbon is already assigned a price through the european cap-and-trade mechanism , but the system is focused on the short term , vulnerable to gaming and plagued by hugely fluctuating prices .
Finding an equilibrium level for the rouble may not be easy , as it depends on oil prices that are fluctuating , and on how quickly trade and capital outflows adjust to the new exchange rates .
These issues , plus the logistics of dealing with multiple nations with their own fluctuating domestic budget constraints , mean that the site won 't be ready for the first experiments until 2020 .