We have to control for the other ways in which they might vary.

They each vary and can be very different from another.

The help available may vary for each college or university.

These can vary the game a lot or a little.

You'll also need to think about doing them at different times of the day as the energy use will vary.

The effect of the change would vary for different companies.

The medical problems that may come up vary by country.

I have to buy enough to vary them every night.

The training time varies from six months to a year.

They are usually available for a short season, which varies around the nation.

If so, how should the music be varied the second time around?

Of course, the ways in which we go about this will vary.

However, these countries vary in terms of their economic development.

Run times can vary from 15 minutes to an hour or longer.

How much is right for your child varies by age.

The terms may vary but could include any, or all, of the following.

Around the country, experience with the two systems has varied.

As for what the police themselves are doing, the answer varies.

Now that 1991 has almost left the room, may I vary the form?

During its history, the look of the church has varied a lot.

The number of players per team could vary, between 2 to 4.

The other two members of the team vary in the series.

Their color varies from green to white, red and black.

They vary between themselves but are very similar in many ways.

As of today the learning process varies and they are many.