The complete cycle of an engine requires four piston strokes: intake, compression power, and exhaust.

发动机完整的循环要求有活塞的四个冲程：进气、压缩、做功、排气。

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Applied to Automatic Control Valves the exhaust pipe auto exhaust valve should be installed on top of the water cycle, the gas readily forms place.

运用于管道排气的自动排气阀应安装在热水循环的顶端，气体容易堆积的地方。

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As the pump rotor continuous rotation, the above cycle of suction and exhaust process and the achievement of the purpose of the pump continuous extraction.

随着泵转子的连续旋转，以上吸气和排气过程循环进行，实现了泵的连续抽气目的。

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To supply the extra juice, utilities turn on inefficient single-cycle gas turbines, which turn 25% of the fuel's energy into electricity, as opposed to 45% for combined-cycle plants that use turbine exhaust to make steam to run a second generator.

FORBES: Magazine Article

Combined-cycle gas turbines, which use hot exhaust gases from one turbine to generate steam to turn a second one, can transform 6, 800 Btu of gas into a kilowatt-hour of electricity, enough to light one lightbulb for ten hours.

FORBES: Indigestion

And with each cycle of growth, and each cycle of financial constraints, we endemically and serially exhaust easy and cheap mines, and then under-invest in finding and opening new ones.

FORBES: Magnetic North: The Canadian (Mining) Miracle