A power winch or an automobile may be used to give the glider enough speed to get into the air, or a plane can tow the glider until an altitude is reached.
可用绞车或汽车给滑翔机足以升空的速度，或用飞机把滑翔机拖至一定海拔高度。
They convinced one of their friends who had just obtained a driver's license to tow them down a street fast enough to get the glider aloft.
两人还说服了一位刚考到汽车驾照的朋友，沿街拖着滑翔机跑，好让滑翔机可以有足够的速度起飞。
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