Space above one's head, as in a motor vehicle, above a doorway, or in a tunnel; clearance. clearway acting as buffer 净空高度如在机动车内、门上方或隧道中的某人头部上端的空间;空间
Designated as an urban clearway When a light passenger plane flew off course some time ago, it crashed in the mountains and its pilot was killed. 不久前,有架轻便客机飞出了航线,在山区坠落了,飞行员丧生了。