horsepower
/ˈhɔ:spauə(r); `hɔrsˌpaʊɚ/ n
(pl unchanged复数不变) (abbr 缩写 hp) unit for measuring the power of an engine, etc (550 foot-pounds per second, about 750 watts) 马力（功率单位, 1马力等於每秒钟把550磅重的物体提高1英尺所作的功, 约为750瓦）
[attrib 作定语]
a twelve horsepower engine 一台十二马力的发动机.