"But the fact is that I can't exist in too high altitudes. The rarefaction of the moral atmosphere--"英文原著 · 《Dolly Dialogues》
A case more frequently to be met with is where currents of air set down Chimnies in consequence of a diminution and rarefaction of the air in a room, occasioned by the doors of the room opening into passages or courts where the air is rarefied by the action of some particular winds. In such cases the evil may be remedied, either by causing the doors in question to close more accurately,--or, (which will be still more effectual,) by giving a supply of air to the passage or court which wants it, by some other way.英文原著 · 《ESSAYS-1》
Furthermore, the current in the great ocean could not have been maintained to run continually one way from the beginning of the world unto this day, had there not been some through passage by the strait aforesaid, and so by circular motion be brought again to maintain itself, for the tides and courses of the sea are maintained by their interchangeable motions, as fresh rivers are by springs, by ebbing and flowing, by rarefaction and condensation.英文原著 · 《Voyages in Search of the North-West Passage》