常见例句雙語例句After ra gentle warm-up, sprint hard up the stairs as fast as you can for 20 (building to 30) seconds, then slowly recover as you walk back down.在溫和的熱身運動之後，以你能達到的最快的速度沖上樓梯，時長約爲20-30秒，接著慢慢走下來以恢複。 返回 walk up building