8h是8 hours的简写，h是小时的单位。
hour：
n.小时;约一小时的时间;(工作、办公等的)固定时间；
复数： hours
扩展资料
There was so much traffic that we were an hour late.
路上车辆那么多，我们迟到了一个小时。
She does an hours piano practice every day.
她每天练一小时钢琴。
It takes me an hour to walk there and back.
我步行往返要花一个小时。
Youre allowed an hour to complete the test.
你们有一个小时的时间来完成这次测验。
