intake stroke

基本解释

These four strokes are intake stroke, compression stroke, power stroke and exhaust stroke.
這四招進氣行程，緊縮行程，動力沖程和排氣沖程。
Let air come in more easily - As a piston moves down in the intake stroke, air resistance can rob power from the engine.
使空氣更容易進入——在吸氣沖程中，儅活塞曏下運動時，空氣阻力將會剝奪引擎一定的動力。
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The piston travels down on the intake stroke, up on the compression stroke, down on the power stroke and up on the exhaust stroke.
進氣行程，活塞下行；壓縮行程，活塞上行；做功行程，活塞下行；排氣行程，活塞上行。