With specially cooled tracks and racing equipment, it is not unusual for luge athletes to reach speeds of one hundred forty kilometers an hour or more.

VOA: special.2010.02.10

So it is not unusual that many popular expressions come from baseball.

VOA: special.2009.04.12

Iranian and U.S.diplomats were aware of one another's presence at the Moscow conference, but said it is not unusual for them to attend the same international forums.

VOA: standard.2009.03.27

The university is unusual. It not only provides laptop computers to all seven thousand of its full-time students.

VOA: special.2009.09.03

Martian methane is also unusual because it is not evenly spread over the planet.

VOA: special.2009.12.30