In fact, of the entire outflow of heat and light, the earth receives only one part in two thousand million, and this is a very small portion indeed. 伯莎M.克拉克.科学通论.
There can be no successful heating without a circulation of air currents, and fortunately for man in his house no good fire can be had without an outflow of heat and an inflow of cooler air. 威廉·亨利·杜利特.世纪发明.
If the water were 20 feet deep, the force of the outflowing water would be twice as strong, because the pressure would be doubled. 伯莎M.克拉克.科学通论.