1. During indicates within a period of time.
We slept during the day.
They practiced basketball during the summer.
2. During means at the same time as another event.
I slept during the football game.
They lived in the north during the war.
Fact
Producer Paul Maslansky was on the set of The Right Stuff when a bus from the local police academy rolled up. After a bunch of freaks walked off, a sergeant explained that the mayor had forced the department to loosen its acceptance standards. Not too long afterwards, Police Academy hit the theaters.
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