The system is most efficient on a clear night when there is less water vapor in the air.

It occurred to him that evolution was more efficient on some planets than others.

Learn whether solar panels will be efficient on your house in this article.

The Islanders might have done better tonight had they been more efficient on the power play.

The public bus system is efficient, on time and cheap.

The Bills were not that efficient on offense today, either, but they did enough to win.

It could be much more efficient on that than a stock video codec.

The man went back to being efficient on the other side of the reception desk.

The streamlined American food distribution system is the most efficient on earth.

German trains are efficient, clean and almost always on time.