In the best case, borrowing costs could rise.

最好的情况是：借款成本可能上升。

youdao

If this week's auction is bad for Lisbon and borrowing costs rise (which they are more than likely to do) this could be the last straw before Portugal has to apply for bailout funds.

如果葡萄牙本周拍卖结果糟糕且借贷成本上升(非常有可能)，则可能成为压倒葡萄牙的最后一根稻草，令其申请紧急救援。

youdao

As a result, Spain's borrowing costs could rise further as investors fret both about the government's solvency and about their place in the creditors' queue.

ECONOMIST: Why the rescue plan for Spain is not enough

Borrowing costs may rise, which could prompt non-American companies to take business elsewhere.

ECONOMIST: Sovereigns v creditors

The rise in borrowing costs could have a negative effect on the economy rather than the positive stimulus effect the Fed anticipated.

FORBES: Bonds And Dollar Defy Bernanke