Since I came here four hours ago, I have been waiting for you here.
自从我四个小时之前来到这里，我就一直在这里等你。
He and his collaborators have spent many hours discussing these issues with the pair of mathematicians since Kochen and Conway first posted their result four years ago.
自从Kochen和Conway四年前首次发表他们的成果以来，Goldstein和他的合作者花了很多时间与两位数学家讨论有关问题。
Internet usage is up to four-and-a-half hours on the Web each week, compared to three-and-a-half hours a year ago.
一年前，万维网的使用率为每周3.5小时，而现在达到了4.5小时。
Two hundred years ago, people awakened after four or five hours of sleep to think about their dreams or talk about them with other people.
两百年前，人们睡四五个小时之后就会醒过来，想一想自己做的梦，或者跟别人讲一讲。
Sideswipe surveyed the area, until we lost contact with him four Earth hours ago.
侧击调查的地区，直到在地球时间四小时前，我们与他失去了联系。
Five years ago, when I had a nine-to-five job, I commuted to work — two to three hours to the office, four to five hours home.
五年前，我做着一份朝九晚五的工作，每天乘车上下班——早上花两三个小时到办公室，晚上再花四五个小时回家。
"Twenty years ago it took a day-and-a-half," she says, "two years ago it took four hours on the superhighway."
二十年前要花一天半的时间，她说，两年前只需高速公路上四个小时。
Four years ago, a mother gave birth to a child and died a few hours later.
四年前，一位母亲生小孩，几个小时后死亡。
Although the rain fell continuously for 30 hours, 13 hours more than four years ago, the intensity of the precipitation is lower.
尽管这次降雨持续了30个小时(比2012年那次还要多13个小时)，但是这次降雨的强度比较小。
For example, only four years ago, a 6.8 magnitude earthquake set off a fire at the Kashiwazaki-Kariwa reactor in northwestern Japan that lasted for two hours and led to a radioactive water leak.
例如，仅在四年前，位于日本西北部的柏崎刈羽核电站因6.8级地震而着火，该场大火持续了2个小时，进而引起了放射性水泄漏。
For example, only four years ago, a 6.8 magnitude earthquake set off a fire at the Kashiwazaki-Kariwa reactor in northwestern Japan that lasted for two hours and led to a radioactive water leak.
例如，仅在四年前，位于日本西北部的柏崎刈羽核电站因6.8级地震而着火，该场大火持续了2个小时，进而引起了放射性水泄漏。
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