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four stroke cycle engine：四冲程循环发动机详图：

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1	four-stroke-cycle engine	四冲程循环发动机
	Combustion engine whose cycle (intake, compression, combustion, exhaust) requires two up-and-down movements of the piston. 其循环（进气、压缩、燃烧、排气）需要两次活塞上下运动的内燃机。
2	exhaust [ɪɡ’zɔːst]	排气
	Phase during which the valve opens and the piston moves back up to expel the burned gases. 阀门打开，活塞向上移动排出燃烧气体的阶段。
3	burned gases	燃烧废气,燃烧过的气体
	Mixture of gases (carbon monoxide, nitrogen oxide and unburned hydrocarbons) filling the combustion chamber after the explosion. 爆燃后充满燃烧室的气体（一氧化碳、氮氧化物和未燃烧的碳氢化合物）的混合物。
4	combustion [kəm’bʌstʃən]	燃烧
	Phase during which the expansion of the gases pushes the piston downward, driving the rotation of the crankshaft. 气体膨胀推动活塞向下，带动曲轴旋转的阶段。
5	explosion [ɪk’sploʊʒn]	爆燃
	Ignition of the air/fuel mixture produces a major energy release that pushes the piston downward. 空气/燃油混合物的点火产生一个主要的能量释放，推动活塞向下。
6	intake [’ɪnteɪk]	吸气
	Phase during which the exhaust valve opens and the piston comes down and draws the air/fuel mixture into the combustion chamber. 排气阀打开，活塞下降并将空气/燃料混合物吸入燃烧室的阶段。
7	air/fuel mixture	空气燃料混合物
	Mixture prepared in the carburetor, containing an amount of fuel proportional to the amount of air entering. 在化油器中制备的混合物，含有与进入空气量成比例的燃料。
8	intake valve	进气阀
	Part that opens to let the air/fuel mixture into the cylinder. 使空气/燃油混合物进入气缸的部分。
9	compression [kəm’preʃn]	压缩
	Phase during which the piston goes up to compress the air/fuel mixture. At the height of the , the spark plug produces a spark. 活塞向上压缩空气/燃料混合物的阶段。在某个高度，火花塞产生火花。
10	spark [spɑːrk]	火花
	Spark produced when an electric current arcs between the two electrodes of a plug and ignites the air/fuel mixture... plug 当电流在火花塞的两个电极之间起弧并点燃空气/燃料混合物时产生的火花。
11	crankshaft [’kræŋkʃæft]	机轴;曲柄轴
	Shaft consisting of a series of cranks, which convert the alternate rectilinear motion of the piston/connecting rod assembly into a continuous circular motion. 由一系列曲柄组成的轴，它将活塞/连杆组件的交替直线运动转换为连续的圆周运动。
12	connecting rod	(活塞与曲拐轴)联结杆，连杆
	Articulated shank powered by the gas explosion; it transmits the thrust from the piston to the crankshaft. 气爆驱动的关节柄；它把活塞的推力传递给曲轴。

1	air/fuel mixture	空气燃料混合物
	Mixture prepared in the carburetor, containing an amount of fuel proportional to the amount of air entering. 在化油器中制备的混合物，含有与进入空气量成比例的燃料。
2	burned gases	燃烧废气,燃烧过的气体
	Mixture of gases (carbon monoxide, nitrogen oxide and unburned hydrocarbons) filling the combustion chamber after the explosion. 爆燃后充满燃烧室的气体（一氧化碳、氮氧化物和未燃烧的碳氢化合物）的混合物。
3	combustion [kəm’bʌstʃən]	燃烧
	Phase during which the expansion of the gases pushes the piston downward, driving the rotation of the crankshaft. 气体膨胀推动活塞向下，带动曲轴旋转的阶段。
4	compression [kəm’preʃn]	压缩
	Phase during which the piston goes up to compress the air/fuel mixture. At the height of the , the spark plug produces a spark. 活塞向上压缩空气/燃料混合物的阶段。在某个高度，火花塞产生火花。
5	connecting rod	(活塞与曲拐轴)联结杆，连杆
	Articulated shank powered by the gas explosion; it transmits the thrust from the piston to the crankshaft. 气爆驱动的关节柄；它把活塞的推力传递给曲轴。
6	crankshaft [’kræŋkʃæft]	机轴;曲柄轴
	Shaft consisting of a series of cranks, which convert the alternate rectilinear motion of the piston/connecting rod assembly into a continuous circular motion. 由一系列曲柄组成的轴，它将活塞/连杆组件的交替直线运动转换为连续的圆周运动。
7	exhaust [ɪɡ’zɔːst]	排气
	Phase during which the valve opens and the piston moves back up to expel the burned gases. 阀门打开，活塞向上移动排出燃烧气体的阶段。
8	explosion [ɪk’sploʊʒn]	爆燃
	Ignition of the air/fuel mixture produces a major energy release that pushes the piston downward. 空气/燃油混合物的点火产生一个主要的能量释放，推动活塞向下。
9	four-stroke-cycle engine	四冲程循环发动机
	Combustion engine whose cycle (intake, compression, combustion, exhaust) requires two up-and-down movements of the piston. 其循环（进气、压缩、燃烧、排气）需要两次活塞上下运动的内燃机。
10	intake [’ɪnteɪk]	吸气
	Phase during which the exhaust valve opens and the piston comes down and draws the air/fuel mixture into the combustion chamber. 排气阀打开，活塞下降并将空气/燃料混合物吸入燃烧室的阶段。
11	intake valve	进气阀
	Part that opens to let the air/fuel mixture into the cylinder. 使空气/燃油混合物进入气缸的部分。
12	spark [spɑːrk]	火花
	Spark produced when an electric current arcs between the two electrodes of a plug and ignites the air/fuel mixture... plug 当电流在火花塞的两个电极之间起弧并点燃空气/燃料混合物时产生的火花。

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