Because nobody knew how to get all those useful parts to work together.

It's interesting, and now all I have time to do is mine it for the useful parts.

"But they have been, and can continue to be a useful part of the plan to control prescription costs."

My mother has told me once and for all the useful parts.

The useful part of my treatment has come to an end, now the harmful bit's beginning.

I can play no further useful part in their affairs.

This will be a useful part of the reform process and I thank you very much for your support.

The initiative proved to be another useful part of this very difficult process.

It doesn't seem to me to be a useful part of his function and is therefore questionable.

They had become useful and decorative parts of the middle class home.