Cách sử dụng
The expression "fight a losing battle" means to keep trying to do something knowing that you will most likely fail. It's like trying to swim upstream, against the current, when you know you can't beat the strong currents. This expression is usually used to describe a hopeless situation or a situation where the outcome is already certain but someone is still trying their best to make it happen. For example, if someone is trying to argue with their boss about a decision that has already been made, they are fighting a losing battle because they are unlikely to change the decision.