Actual labor hours of effort needed to implement the change.
实际实现变更所花的工作时间。
Consider overtime and after-hours labor costs, and be sure to include a training budget.
考虑加班和营业外时间劳动成本，并确保包括培训预算。
It took thousands of hours of volunteer labor to ready the building for show.
这座建筑在准备迎接游客之前，需要数千小时的义务劳动。
It took thousands of hours of volunteer labor to ready the building for show.
这座建筑在准备迎接游客之前，需要数千小时的义务劳动。
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