She calculates 40 hours as almost exactly her point of diminishing returns.
她认为自己的收益递减点差不多刚好是40个小时。
2
You should also look at how many hours per use case point (h) are needed.
您还需要查看每一个用例点需要多少个小时(H)。
3
Petra Kroon tested the new technique, which can measure emission values at a single point for 24 hours a day, 365 days a year and for several hectares at the same time.