translation.en: Rob Grover: Friction really starts to build up on the spacecraft, and we use the friction when it's flying through the atmosphere to our advantage to slow us down.
translation.zh: Rob Grover：航天器会与大气产生空气摩擦阻力 利用飞越大气层时的空气摩擦力减速。 利用飞越大气层时的空气摩擦力减速。