n.蹦極；過(guò)度操縱防止器；橡皮筋；松緊繩
It's the only reason bungee jumping exists. 這就是蹦極跳運(yùn)動(dòng)出現(xiàn)的惟一原因。
Someone tied a bungee cord to himself one day and jumped off of a very tall bridge. 某天某人用橡皮筋套住自己，然后從一個(gè)很高的橋上跳下。
n.蹦極
