"We feel he has made a serious contribution to mathematics."

"We do not pretend that this will be a solution to all our problems," he said, "but it does provide an important and serious contribution."

Probably eager for a chance to make a serious contribution; machines were like that.

"To a lady who does not take serious contributions from idiots," he announced.

The media have been criticized for focusing more on the first lady's fashion sense than her serious contributions.

This Empire line is one of his serious contributions to fashion's new direction.

His work in Ireland alone is widely acknowledged to be a serious contribution.

We seem unable to make a serious contribution to the development of the least developed countries.

Sustainable, efficient and clean cars can make a serious contribution in the fight against climate change.

Is this intended to be a serious contribution to a political discussion?