The yield from both sources has considerably decreased. 佚名.神奇的知识之书.
I began with such scanty sources of information as were at my own disposal. 威尔基·柯林斯.白衣女人.
Supplies were growing scarce in Richmond, and the sources from which to draw them were in our hands. 尤利西斯·格兰特.U．S．格兰特的个人回忆录.
The conservation of the forest means the conservation of our waterways, whether these be used for transportation or as sources of drinking water. 伯莎M.克拉克.科学通论.
Of all the sources of evil surrounding the former, since her coming to Highbury, she was persuaded that she must herself have been the worst. 简·奥斯汀.爱玛.
Every tax must finally be paid from some one or other of those three different sources of revenue, or from all of them indifferently. 亚当·斯密.国富论.
But I was restlessly curious to look at her--so curious that I felt it to be one of the few sources of entertainment left to me. 查尔斯·狄更斯.小杜丽.
Or if it be possible to imagine, that such errors are the sources of all immorality? 戴维·休谟.人性论.
Dan--Bashan--Lake Huleh --the Sources of Jordan--the Sea of Galilee. 马克·吐温.傻子出国记.
The sources of this general or public revenue, I shall endeavour to explain in the following chapter. 亚当·斯密.国富论.
The story of the Creation and the Flood, much of the story of Moses, much of Samson, were probably incorporated from Babylonian sources. 赫伯特·乔治·威尔斯.世界史纲.
The blight, I believed, was chiefly external: I still felt life at life's sources. 夏洛蒂·勃朗特.维莱特.
According to him there are two sources of knowledge, reason and revelation. 李贝.西洋科学史.
But the amount of potash thus obtained is far too limited to supply the needs of agriculture; and to-day the main sources of potash are the vast deposits of potassium salts found in Prussia. 伯莎M.克拉克.科学通论.
Besides, he was obliged to raise additional large sums of money from other sources for this purpose. 弗兰克·刘易斯·戴尔.爱迪生的生平和发明.
Rivers flowed back towards their sources; peaks and lofty mountains where countless trees had grown for ages rolled crumbling to the earth. 赫伯特·乔治·威尔斯.世界史纲.
Had they faced the human sources of their problem, had they tried to think of the social evil as an answer to a human need, their researches would have been different, their remedies fruitful. 沃尔特·李普曼.政治序论.
Once on the south side of the James River, I can cut off all sources of supply to the enemy except what is furnished by the canal. 尤利西斯·格兰特.U．S．格兰特的个人回忆录.
An apparatus for generating coal gas on a small scale for private establishments, remote from sources of ordinary supply, is represented in the accompanying woodcut. 弗雷德里克·科利尔·贝克维尔.伟大的事实.
Perdita had permitted us to take Clara back with us to Windsor; and she and my two lovely infants were perpetual sources of interest and amusement. 玛丽·雪莱.最后一个人.
The whaling fleets, long after gas came into use, were one of the greatest sources of our national wealth. 弗兰克·刘易斯·戴尔.爱迪生的生平和发明.
We get our light upon that life from various sources. 赫伯特·乔治·威尔斯.世界史纲.
The contributions to the art and the improvements in the manufacture of talking machines and talking-machine records from sources outside of the United States have been very unimportant. 佚名.神奇的知识之书.
Land and capital stock are the two original sources of all revenue, both private and public. 亚当·斯密.国富论.
The further we get away from this direct, first-hand source of knowledge, the more numerous the sources of error, and the vaguer the resulting idea. 约翰·杜威.民主与教育.
The ordinary revolutions of war and government easily dry up the sources of that wealth which arises from commerce only. 亚当·斯密.国富论.
But she forgot to be afraid, she who had such great sources of fear. 戴维·赫伯特·劳伦斯.恋爱中的女人.
The rumor was confirmed there, also, from other sources. 尤利西斯·格兰特.U．S．格兰特的个人回忆录.
His real power to generalize is shown in connection with his sp ecialty, in his treatment of the sources of building-material, rather than in his consideration of the origin of matter. 李贝.西洋科学史.
Near the sources of the Arveiron we performed the rites for, four only excepted, the last of the species. 玛丽·雪莱.最后一个人.