It will be seen, therefore, that this method of duplexing is practiced, not by varying the strength or polarity, but by sending TWO KINDS OF CURRENT over the wire. 弗兰克·刘易斯·戴尔.爱迪生的生平和发明.
The method most commonly practiced in working with apple trees is called bud-grafting, and consists of transferring a plate of bark, with one or more buds attached, from one tree to another. 佚名.神奇的知识之书.
Whenever governments enter upon foreign invasions in order to avoid civil wars, the same trick is practiced. 沃尔特·李普曼.政治序论.
The process of slaughtering and dressing pork, as practiced to-day, is a continuous one, and is well illustrated in Fig. 170, in 13 operations. Edward W. Byrn.十九世纪发明进展.
He practiced with his rope and played with his sharp knife, which he had learned to keep keen by whetting upon flat stones. 埃德加·赖斯·巴勒斯.人猿泰山.
Besides metallurg y they practiced the arts of weaving, dyeing, distillation. 李贝.西洋科学史.
Secrecy may be advisable; but still I cannot help wondering at its being practiced by him. 简·奥斯汀.理智与情感.
After I became a telegraph operator, he says, I practiced for a long time to become a rapid reader of print, and got so expert I could sense the meaning of a whole line at once. 弗兰克·刘易斯·戴尔.爱迪生的生平和发明.
Guided by practiced hands it moves swiftly out into the yard, turns sharply and enters the final inspection line. 佚名.神奇的知识之书.
Deftly he removed the great pelt, for he had practiced often on smaller animals. 埃德加·赖斯·巴勒斯.人猿泰山.
In discussing, for example, education in music he raises the question how far the young should be practiced in the playing of instruments. 约翰·杜威.民主与教育.
The practiced knights from Palestine made holyday sport of carving the awkward men-at-arms into chops and steaks. 马克·吐温.傻子出国记.
Though but ten years old he was fully as strong as the average man of thirty, and far more agile than the most practiced athlete ever becomes. 埃德加·赖斯·巴勒斯.人猿泰山.
This use of leaven for raising bread has been practiced for ages. 伯莎M.克拉克.科学通论.
Solon is supposed to have practiced it; and even Lycurgus. 赫伯特·乔治·威尔斯.世界史纲.
Vegetables and both shade and fruit trees are being grown in districts where dry farming is practiced. 佚名.神奇的知识之书.
A little later, when Edison was employed as operator in the railroad office at Indianapolis, he practiced receiving newspaper reports in his spare hours at night. 鲁伯特·萨金特·荷兰.历史性发明.
Twenty years ago the Populists were hated and feared as if they practiced black magic. 沃尔特·李普曼.政治序论.