And the launch shuttle can brake quickly once the plane has lifted off ( and then return for another launch ) by reversing the current running through the motor .
飞机一旦起飞后，发射平台可以反转马达的电流方向进行快速制动（回位进行下一轮发射）。
The first step involves adopting a good enough diet and exercise regime to live long enough for biotechnology to unravel the ageing process and for nanotechnology to be capable of slowing it down and ultimately reversing it .
The logical way to wind down reserves would be by reversing the process : for reserves managers to wait until the local currency is weakened by big capital outflows or a sudden lack of inflows , then sell foreign holdings to prop it up .
