The development of colour photography required greater refinement of effects techniques.

At this stage of modeling, some relationships may be non-specific and will require additional refinement in subsequent phases.

As a result, the interface did not fit as well as hoped and many of the games required further refinement.

The addition of salt turns the basic combination of sweet and sour into a menage a trois, requiring further refinement.

The reading process requires continuous practice, development, and refinement.

The daunting title role requires French lyrical refinement, a bright top voice and heroic heft - an almost impossible combination.

Each of these test are of increasing difficulty and require increasing refinement in skill level that a hunting retriever must demonstrate while under judgment.

I would like to propose one broadly based category which will clearly require extensive elaboration and refinement.

This is a difficult prospect that will require collective innovation, development, field-testing, evaluation and refinement.

The Guidelines also require refinement and elaboration through application to real projects, including historical ones.