The details of the life histories of other species vary to a small extent.

Dimensions vary geographically, to an extent rarely found among other mammals.

The person in the center square may call additional rules, which can vary to an enormous extent.

The rules vary to a great extent between the countries.

The time of appearance may vary to a certain extent depending upon environmental conditions.

Interpretations of these constraints, however, have varied to a great extent.

These also vary in size and shape, but to a far lesser extent, and they're all the same color: green.

These relations vary to a great extent from place to place and are not easy to measure.

This tradition varies to a little extent from one place to another.

These vary between countries and to a lesser extent regionally.