twenty-fourth part of a day and night; sixty minutes
number of hours past midnight
fixed period of time for work, use of facilities, etc.
period of about an hour; distance that can be travelled in an hour
point in time
indefinite period of time
"the job will take more than an hour"
"the hour is getting late"
"it was their finest hour"
"we live an hour from the airport"
"its just 10 minutes away"
We sped along..at fifty miles an hour.
出自： Scott Fitzgerald
A couple of hours of any party is enough for me.
出自： M. Drabble
误 The whole thing was held up about half of an hour〔half hour〕.
正 The whole thing was held up about half an hour〔a half hour〕.
析 “半个小时”通常说half an hour或者a half hour,而不说half of an hour或者half hour。