Fig 5 represents a double-convex lens, Fig. 6 a double-concave, and Fig. 7 a concavo-convex or meniscus. By these it is seen that a double-convex lens tends to condense the rays of light to a focus, a double-concave to scatter them, and a concavo-convex combines both powers.英文原著 · 《American Hand Book of the Daguerreotype》
And then the two pairs of soldiers led the horses through the double streets, the captains marching ahead with drawn swords, and crowds of twin men and twin women coming from the double doors of the double houses to gaze upon the strange sight of men and horses who were not double.英文原著 · 《The Enchanted Island of Yew》
"And all our houses are built double, with twin doors and windows and chimneys, to accommodate our twin people," continued the High Ki. "And the trees and flowers--and even the blades of grass--are all double. And our roads are double, and--and everything else is double. I alone, the ruler of this land, am singular!"英文原著 · 《The Enchanted Island of Yew》
1 double " rifle . 2 double " guns . Baker . 3 double " " . 1 double " " . 1 single " rifle . Baker . 1 single " rifle .英文原著 · 《The Rifle and Hound in Ceylon》
The Klosking put two hundred pounds on red: it won. She doubled: red won. She doubled: there was a dead silence. The creole lady put the maximum on red, three hundred pounds: red won. Ina Klosking looked a little pale; but, driven by some unaccountable impulse, she doubled. So did the creole. Red won. The automata chucked sixteen hundred pounds to the Klosking, and six hundred pounds to the other lady.英文原著 · 《A Woman-Hater》
Ina bet forty pounds on black. Red won again. She put two hundred pounds on black: black won. She doubled: black won again. She doubled: black won. Doubled again: black won.英文原著 · 《A Woman-Hater》
* [SINGING] He was a double, doubleDouble-jointed boy Hey.美剧 · 《Friends》
You double the tax. Not double the tax of Romania.美剧 · 《Friends》
So you can double efficiency with a 60 percent internal rate of return. So you can double efficiency with a 60 percent internal rate of return.演讲 · 《Winning the oil endgame ~ Amory Lovins》