英语翻译Power(Horsepower)·Poweristheworkdoneinagiventime,ortherateofdoingworkpowermaybeexpressedinternsofworkperminuteorworkpersecond..However,intheEnglishsystemofmeasurementitisexpressedinhorsepower(hp).This

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英语翻译
Power(Horsepower)·Power is the workdone in a given time,or the rate of doing work power may be expressed in terns of work per minute or work per second..However,in the English system of measurement it is expressed in horsepower(hp).This term was first used by James Watt as he tried to compare the power of a steam engine with the power of a horse.He found that a horse could lift a 150-1b load 2/3 feet per second (ft/s) doing 550 ft.1b of work every second,or 33 000 ft.16 of work every minute.From these observations came the horsepower (hp) unit,the unit of power in the Englise system of measurement.
In the metric system horsepower is meadured in watts (W) or in kilogram-meters per second (kg·m/s).(1 hp=745.7W=76.04 kg·m/s)
Engines are rated according to their power output and torque.Indicated horsepower (ihp) is the power transmitted to the pistons by the gas in the cylinders.When designing an engine,engineers mathematically calculated horsepower.This calculation is about 15 percent more than the actual horsepower at the flywheel.Some latitude is allowed when calculating the length,height,and width of an engine in order to determine the dimension and mean effective pressure (mep).Designers,nevertheless,must consider:the length of the stroke,the rotation speed and the cross-sectional area of the cylinder,the number of cylinders,the compression ratio,and the volumetric efficiency.The formula used to calculate ihp for a four-cycle engine is:

Answer 1

功率（马力）
功率是指单位时间内所做的功,通常可以用每分钟或每秒钟所做的功来表示.在英制里,功率的单位是马力（hp）.该术语是由詹姆斯瓦特在对蒸汽机和一匹马的功率进行比较式首次使用的.瓦特发现一匹马能够以2/3英尺每秒（ft/s）的速度拉着150磅重的负荷每秒钟做550英尺-磅（ft-lb）功,或每分钟做33000英尺-磅（ft-lb）功.从中得到马力（hp）这个单位,即英制体系中功率的标准单位.
在公制里,功率的单位为瓦（W）或千克-米每秒（kg-m/s）.1马力（hp）=745.7W=76.04kg-m/s.
通过输出功率和扭矩来衡量发动机（引擎）.额定马力（ihp）指的是由气缸传输到活塞上功率.在设计一个发动机时,工程师采用数学方法来计算马力.该计算值比飞轮上的实际功率高约15%.为确定尺寸及平均有效压力（mep）,在计算发动机的长度、高度、及宽度时可适度调整.不过,设计者必须考虑如下因素：气缸的冲程长度,气缸转速及其横截面积,气缸数目,压缩比,以及充量系数.计算四缸引擎的额定马力（ihp）时可采用以下公式：
我居然翻出来了.真是闲的啊