可能非常贵。它取决与你签的是什么样的合同。可以按小时计算，也可以按年度计算。
It can be very expensive. It just depends on the contract. It can be hourly or yearly.
耳背式助听器使用纽扣式电池，合格的产品使用寿命应在200小时左右，按每日使用12小时计算，有效使用期限约为两周。
BTE button battery life, the qualified products should be in 200 hours or so, is calculated by using 12 hours a day, period of validity for about two weeks.
每一天按工作10小时计算，一天的产量为1320个节能灯。
Everyday presses to work to compute for 10 hours, the yield for a day is 26880 economy energy lights.
每日窃电时间，电力用户按12小时计算，照明用户按6小时计算。
The time of stealing electric power per day shall be calculated as 12 hours for power users and 6 hours for lighting users.
每日窃电时间，电力用户按12小时计算，照明用户按6小时计算。
The time of stealing electric power per day shall be calculated as 12 hours for power users and 6 hours for lighting users.
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