主要有两种含义：一是Microsoft office Excel 中的 HOUR函数；二是英语单词“小时”的意思。编辑摘要
Microsoft Excel 中 HOUR函数，返回时间值的小时数。即一个介于 0 (12:00 A.M.) 到 23 (11:00 P.M.) 之间的整数。
小时An hour is a period of sixty minutes.
They waited for about two hours...
I only slept about half an hour that night.
...a twenty-four hour strike...
长时间People say that something takes or lasts hours to emphasize that it takes or lasts a very long time, or what seems like a very long time.
Getting there would take hours.
（1）（时钟的）钟点，整点A clock that strikes the hour strikes when it is exactly one o'clock, two o'clock, and so on.
（ 2）时间；时刻You can refer to a particular time or moment as a particular hour .
...the hour of his execution...
The gathering storm had made the day even darker than was usual at this hour.
（1）（人一生中的某个）时候，时期If you refer, for example, to someone's hour of need or hour of happiness, you are referring to the time in their life when they are or were experiencing that condition or feeling.
He recalled her devotion to her husband during his hour of need.
...the darkest hour of my professional life.
（2）每天发生或进行某事的）特定时间，固定时间You can refer to the period of time during which something happens or operates each day as the hours during which it happens or operates.
...the hours of darkness...
Phone us on this number during office hours.
...outside prison visiting hours.
（3）（每周的）工作时间If you refer to the hours involved in a job, you are talking about how long you spend each week doing it and when you do it.
worked quite irregular hours.
The job was easy; the hours were good.
（1）See also:after-hours；下班后；营业（或办公、学习）时间以后If you do something
after hours, you do it outside normal business hours or the time when you are usually
...a local restaurant where steel workers unwind after hours...
Daly kept this school open after hours so it doubled as a community center.
(2)在（某一时段的）任何时刻If you say that something happens at all hours ofthe day or night, you disapprove of it happening at the time that it does or as often as it does.
She didn't want her fourteen-year-old daughter coming home at all hours of the morning.
...a neighbour's car alarm going off at all hours of the day and night.
(3)在凌晨；在下半夜If something happens in the early hoursor in the small hours, it happens in the early morning after midnight.
Gibbs was arrested in the early hours of yesterday morning.
(4)长时间地；不停地If you say that someone does something hour after hour, you are emphasizing that they do it continually for a long time.
He and my mom were arguing every night, hour after hour.
（5）整点地If something happens on the hour, it happens every hour at, for example, nine o'clock, ten o'clock, and so on, and not at any number of minutes past an hour.
（6）整点差…分/ 整点过…分If you want to state the time exactly, you can give a number of minutes followed by before the houror past the hour.
（7）在通常营业（或工作、学习）时间之外Something that happens out of hourshappens at a time that is not during the usual hours of business or work.
Teachers refused to run out of hours sports matches because they weren't being paid.
Serial_number 必需。一个时间值，其中包含要查找的小时。时间有多种输入方式：带引号的文本字符串（例如 "6:45 PM"）、十进制数（例如 0.78125 表示 6:45 PM）或其他公式或函数的结果（例如 TIMEVALUE("6:45 PM")。