Micrometer
[maɪ'krɒmɪtə] or [maɪkrɑmɪtɚ]
解释:
(n.) An instrument, used with a telescope or microscope, for measuring minute distances, or the apparent diameters of objects which subtend minute angles. The measurement given directly is that of the image of the object formed at the focus of the object glass.
克莱夫整理
解释:
n. an instrument for measuring minute distances or angles.—adjs. Micromet′ric -al.—ns. Microm′etry measuring with a micrometer; Mī′cron the millionth part of a metre or 1⁄25400 of an inch; Mī′cro-or′ganism a microscopic organism.
录入:玛莎
例句:
- The micrometer was a further advance in exact measurement. 李贝. 西洋科学史.
- This is ascertained by means of a micrometer screw, S, which moves a needle, T, in front of the dial. 弗兰克·刘易斯·戴尔. 爱迪生的生平和发明.
- About 1639 Gascoigne, a young Englishman, invented the micrometer, which enables an observer to adjust a telescope with very great precision. 李贝. 西洋科学史.
- Before the invention of the micrometer exactitude was impossible, because the adjustment of the instrume nt depended on the discrimination of the naked eye. 李贝. 西洋科学史.
坎迪编辑