It takes a short time to jump over obstacles quickly, which means that you have encountered bumps, but you have to raise your strength to cross them. Fast means high speed; It takes a short time to walk, do things, etc. I can't cross it. I describe it as bumpy, but I am eager to cross it. Therefore, it takes a short time to cross the hurdle quickly, which means that you have encountered bumps, but you have to raise your strength to cross.