A small slipstream of circulating HF acid is regenerated internally to mantain acid purity at the desired level.为了使酸纯度维持在目标水平，需要从氢氟酸循环流分出一小股流使其再生？
His main problem was that his in-lap speed was determined by Schumacher's, up ahead, and only at the last second could h他的主要问题是他的进站圈的速度取决于舒马赫的速度，只有到最后一秒他才能从法拉利的尾流中摆脱出来进入维修区。