Its C.P. is then obviously along the exact centre line of the surface as illustrated. In B, C, and D the surfaces are shown with angles of incidence decreasing to nothing, and you will note that the C.P. moves forward with the decreasing angle. Now, should some gust or eddy tend to make the surface decrease the angle, i.e., dive, then the C.P. moves forward and pushes the front of the surface up. Should the surface tend to assume too large an angle, then the reverse happens--the C.P. moves back and pushes the rear of the surface up.英文原著 · 《The Aeroplane Speaks》
Such application is not quite correct, since ``plane'' indicates a flat surface, and the lifting surfaces are always cambered. Propeller--See ``Air-Screw.''
Propeller, Tractor--An air-screw mounted in front of the main lifting surface. Propeller, Pusher--An air-screw mounted behind the main lifting surface. Pusher--An aeroplane of which the propeller is mounted behind the main lifting surface. Pylon--Any V-shaped construction from the point of which wires are taken. Power--Rate of working. Power, Horse--One horse-power represents a force sufficient to raise 33,000 lbs. 1 foot in a minute.英文原著 · 《The Aeroplane Speaks》
The accident occurred directly over 30d and about 52d N. The surface wind was blowing a tempest from the west. To attempt to ride out such a storm upon the surface seemed suicidal, for the Coldwater was not designed for surface navigation except under fair weather conditions. Submerged, or in the air, she was tractable enough in any sort of weather when under control; but without her screen generators she was almost helpless, since she could not fly, and, if submerged, could not rise to the surface.英文原著 · 《The Lost Continent》
"Let us assume it was a blood-spot, however. What did it show? It was just a little regular round spot, quite thick. Now, drops of blood falling only a few inches usually make a round spot with a smooth border. Still the surface on which the drop falls is quite as much a factor as the height from which it falls. If the surface is rough the border may be irregular. But this was a smooth surface and not absorbent. The thickness of a dried blood-spot on a non-absorbent surface is less the greater the height from which it has fallen.英文原著 · 《The Silent Bullet》
The point to be aimed at is, the production of a surface of such exquisite polish as to be itself invisible, like the surface of a mirror. The secret of producing pictures discernible in any light, lies in this: the more dark, deep and mirror-like the surface of the plate, the more nearly do we approach to perfection.英文原著 · 《American Hand Book of the Daguerreotype》
Area of surface illuminated, 8,000,000 square feet; 2,000,000 of wall surface, and 6,000,000 of ground surface.英文原著 · 《The City of Domes》
Surface-to-surface missiles delivered sarin at about three o'clock in the morning, our time.美剧 · 《House of Cards》
Plus twice we did it like dogs on the hallway stairs and on every smooth surface in my apartment.美剧 · 《2 Broke Girls》
Andy is great. And on the surface, he was there for me and very supportive.美剧 · 《2 Broke Girls》
I am in process of extracting an assurance from the United States Attorney for the Eastern District, that my role and my family's role shall never surface.美剧 · 《Billions》