Another large difference was observed between the $1 and $20 groups.

Some differences in memory performance have been observed between men and women.

This is a reduction of 60% on the rate observed between 1993-2005.

Differences in speech styles may also be observed between other social groups.

He observed a curious tension between the two men the first time their hands touched.

No such gap was observed between good and poor students who drank alcohol.

No difference in muscle damage was observed between male and female mice.

This effect has not yet been observed between homosexual and heterosexual males.

Numerous connections have been observed between some, though not all, of these exceptional objects.