In this a vacuum is maintained by a condenser, the vapors passing from the pan to the condenser through the great curved pipe rising from the top, which pipe is five feet in diameter. Edward W. Byrn.十九世纪发明进展.
Volta of Pavia, took decided issue with Galvani and maintained that the pretended animal electricity was nothing but electricity developed by the contact of two different metals. 威廉·亨利·杜利特.世纪发明.
It is called a siphon recorder because the record is made by a little glass siphon down which a flow of ink is maintained like a fountain pen. Edward W. Byrn.十九世纪发明进展.
Some authors have maintained that the amount of variation in our domestic productions is soon reached, and can never afterward be exceeded. 查尔斯·达尔文.物种起源.
The draught is maintained by placing the apparatus on a couple of bricks, and regulated by closing the intervening space with mud, leaving only a sufficient aperture to keep the fire burning. 威廉K.戴维.智者、化学家和伟大医生的秘密.
In such cases their internal freedom was maintained by a royal or imperial charter. 赫伯特·乔治·威尔斯.世界史纲.
So close was this resemblance, that a native Dyak maintained that the foliaceous excrescences were really moss. 查尔斯·达尔文.物种起源.
The buzzer, R, is maintained in rapid vibration by its independent auxiliary battery, B<1S>. 弗兰克·刘易斯·戴尔.爱迪生的生平和发明.
In both the Republic and Statesman a close connection is maintained between Politics and Dialectic. 柏拉图.理想国.
He maintained all his delightful qualities to the last, until we started forth, at eight o'clock, for Mr. Peggotty's boat. 查尔斯·狄更斯.大卫·科波菲尔.
By removing his stock, he would put an end to all the industry which it had maintained in the country which he left. 亚当·斯密.国富论.
I maintained a grave silence for some minutes. 夏洛蒂·勃朗特.简·爱.
In 1844 he proceeded to apply the principles maintained in his earlier study to changes of temperature as related to changes in the density of gases. 李贝.西洋科学史.
This role of mind in continuous activity is not always maintained, however. 约翰·杜威.民主与教育.
Wamba did him the service he required, and they rode side by side for some time, during which Gurth maintained a moody silence. 沃尔特·司各特.艾凡赫.
My mother would be very proud could she only know how well I have maintained the traditions of my father's prowess. 埃德加·赖斯·巴勒斯.火星战神.
Discipline must be maintained. 查尔斯·狄更斯.荒凉山庄.
Fleets and armies are maintained, not with gold and silver, but with consumable goods. 亚当·斯密.国富论.
He lived in chambers in the Albany, did Fledgeby, and maintained a spruce appearance. 查尔斯·狄更斯.我们共同的朋友.
The accompanying diagram and explanation may serve to remove the difficulty of understanding why the two circuits are maintained quite distinct. 弗雷德里克·科利尔·贝克维尔.伟大的事实.
The other youth maintained the contest with such spirit as to call forth enthusiastic bursts of applause. 马克·吐温.傻子出国记.
From these facts it can no longer be maintained that varieties when crossed are invariably quite fertile. 查尔斯·达尔文.物种起源.
Hence it appeals to thought; it demands that an idea of an end be steadily maintained, so that activity cannot be either routine or capricious. 约翰·杜威.民主与教育.
I rather inferred that, sir,' replied John Rokesmith, 'from the scale on which your new establishment is to be maintained. 查尔斯·狄更斯.我们共同的朋友.
Sedley still maintained his ascendency over the family of Mr. Clapp, his ex-clerk. 威廉·梅克比斯·萨克雷.名利场.
But you maintained your post? 沃尔特·司各特.艾凡赫.
In the sixth chapter I enumerated the chief objections which might be justly urged against the views maintained in this volume. 查尔斯·达尔文.物种起源.
In the midst of this intemperate riot, Attila alone, without change of countenance, maintained his steadfast and inflexible gravity. 赫伯特·乔治·威尔斯.世界史纲.
This line of argument seems to have had great weight in leading Fritz Muller to accept the views maintained by me in this volume. 查尔斯·达尔文.物种起源.
Bergmann maintained that he must be mistaken. 弗兰克·刘易斯·戴尔.爱迪生的生平和发明.