Perfecting

例句:

• It was exploited under the powerful patronage of a syndicate of newspaper men, and hundreds of thousands of dollars were spent in perfecting it before any practical results were obtained. Edward W. Byrn. 十九世纪发明进展.
• The plate is then returned to the engraving department, which completes the work, burnishing darks, engraving highlights, removing slight imperfections and otherwise perfecting the plate. 佚名. 神奇的知识之书.
• Edison in bringing out and perfecting his system of incandescent lighting. 弗兰克·刘易斯·戴尔. 爱迪生的生平和发明.
• He was very much occupied perfecting new commercial schemes, protecting his patents from a horde of pirates, and planning to introduce his invention into Europe. 鲁伯特·萨金特·荷兰. 历史性发明.
• Henry had succeeded in perfecting the electromagnet, that dial and printing telegraphs were successfully produced. 威廉·亨利·杜利特. 世纪发明.
• Fourdrinier having expended ￡60,000 in perfecting the machine. 弗雷德里克·科利尔·贝克维尔. 伟大的事实.
• Prior to 1871, inventions in this art were mainly directed to perfecting the structure of this primary gin. 威廉·亨利·杜利特. 世纪发明.
• And the idea of perfecting an inner personality is a sure sign of social divisions. 约翰·杜威. 民主与教育.
• To-day it stands a triumph of human ingenuity, ranking in importance with the rotary web-perfecting press, and is probably the most ingenious piece of practical mechanism in existence. Edward W. Byrn. 十九世纪发明进展.
• One of the latest quadruple stereotype perfecting presses made by Hoe & Co. 威廉·亨利·杜利特. 世纪发明.
• Both logically and educationally, science is the perfecting of knowing, its last stage. 约翰·杜威. 民主与教育.

录入:莱尔