当遇到不稳定的气流时，蜘蛛网就被剧烈扭曲，象空中张开的降落伞一样，将蜘蛛送上一段未知旅途。
When the dragline is caught in a turbulent breeze , it becomes highly contorted , catching air like an open parachute and sending the spider on an unknown journey .
降落伞蜘蛛