hour

详细解释:n. 小时, 钟头, 时间, ...点钟, 课时
相关词组:
at the eleventh hour
by the hour
hour after hour
on the hour
serve the hour
help in sb's hour of need

英语解释：

名词 hour:

a period of time equal to 1/24th of a day同义词：hr, 60 minutes