The quality of the light changed throughout the day and varied by season.

Quality of the data may vary from a sample to another.

Health Authority data are often used but their quality varies.

As in many countries, the quality of education offered by different public high schools varies.

You can find them on the Internet by the thousands, and the quality varies.

The quality of pieces varied from quite basic to very fine.

The quality often varies, but the spirit is usually there.

The type and quality of medical information about a child can vary greatly between countries.

The quality of health care services varies but it can be measured.

For that reason, many producers are trying to make them, but quality varies.