Building suspension bridges requires you to work high up off the ground and demands both courage and great care. Once your sense of balance falters, danger lurks on every side. You may even tumble down into the ravine below and lose your life.
吊橋工程屬於高空作業，最需要「膽大心細」及高度的平衡感，稍一不慎，險象環生，甚至掉落溪谷，命喪黃泉。