At all costs 不惜一切代价；无论如何
例句：
He wanted to save her life at all costs.
他想不惜一切代价挽救他的生命。
We should promote the project at all costs.
我们无论如何都要推进这个项目。
A:I want to buy the new LV bag at all costs.
我想买新款的LV包包。
B:You are still a student, I don't think it's necessary.
你还是一个学生，我觉得没有必要。