man-hour 英语 替代写法 manhour词源 来自man + hour。 名词 man-hour（复数 man-hours） 工时 Ten workers for two days—that's 160 man-hours.十个工人工作两天——就是160工时。1962 January 11, John F. Kennedy, Second State of the Union Address: Since 1950 our agricultural output per man-hour has actually doubled!参见 girl-hour man-day man-month man-year manshift
