绷床 meaning in Chinese

[杂技] trampoline

What exactly you have to do to evolve your tribe is not specifically clear yet , but if the screenshots are anything to go by it looks as though you must use a trampoline to bounce one of your cavemen around the screen in order to catch falling collectables
怎样去发展进化你的部落，目前还不清楚，但是如果屏幕上出现了一些物品后，你必须使用绷床弹出你的原始人去收集那些物品。