银行借款成本英语称为"bank loan cost"或"borrowing cost from a bank".

银行借款成本的来源包括利息和手续费。利息是银行向借款人收取的费用，表示银行出借钱币的成本。手续费是银行向借款人收取的费用，表示银行为提供借款服务而收取的费用。

一些英文例句和中文翻译如下：

"The bank loan cost for this project is quite high, but we have no other choice." (这个项目的银行借款成本相当高，但我们别无选择。)
"We need to carefully calculate the bank loan cost before deciding whether to borrow from the bank." (我们需要仔细计算银行借款成本，才能决定是否从银行借款。)
"The bank loan cost includes both interest and fees." (银行借款成本包括利息和费用。)
"We were able to negotiate a lower bank loan cost with the bank." (我们能够与银行谈判，使银行借款成本降低。)