So there's a main parachute and a reserve parachute, and if I do nothing, the reserve parachute is going to open because of an automatic opening device.
有一个主降落伞包和一个备用降落伞包， 如果我什么都不做（译注：失去意识或行为能力）， 备用降落伞包将会被自动启用装置打开。