Atmospheric pressure then pushes the piston back down the cylinder, and if anything (such as a pump) is attached to the piston, some useful work can be done.

于是，气压就会再次将活塞推至汽缸底部。而假如有诸如水泵这样的物体与活塞连接，就可以在活塞的带动下完成一些工作。

youdao

Plug-in hybrids, meanwhile, could charge at night, when demand is low, and even pump power back to the grid while parked during the day.

同时，当夜晚用电低谷时，可以利用混合动力装置充电(译注：wikipedia)，甚至可以在白天再把电力传输回电网里。

youdao

I back my car up to the next pump, hurry to get away from her.

为了躲她远点，我匆匆调转车头向下一个油泵驶去。

youdao

Smit, which in charge of salvaging Prestige before it sank, said the operation - to pump the oil back to the surface - would cost nearly 50m euros and take several months to complete.

BBC: French sub to try patching Prestige

This is an application, so most of what today's filing tells us is certainly not set in stone, but new ideas include a "kinetic energy gathering component" within the band -- like the trickle charge feature found on watches -- to pump energy back into the device.

ENGADGET

Back at the fuel pump, Mr Butler is setting off to Heathrow, powered by the left-overs from his own local fish and chip shop.

BBC: NEWS | UK | England | Devon | Dean ditches diesel for veg oil