no matter what, when, why, etc. idiom
B2 不管什么／何时／为什么等
used to emphasize that something is always true, or that someone must do something
I never seem to lose any weight, no matter how hard I try. 不管我怎么努力，体重似乎都减不下来。
We've got to get to the airport on time, no matter what. 总之，我们必须按时到机场，不管用什么办法。