Such a companion for herself in the periods of anxiety and cheerlessness before her! 简·奥斯汀.爱玛.
He infers that many species have kept true for long periods, whereas a few have become modified. 查尔斯·达尔文.物种起源.
There have been other periods of revolution. 沃尔特·李普曼.政治序论.
In the earlier periods of the monarchy, the clergy of France appear to have been as much devoted to the pope as those of any other country. 亚当·斯密.国富论.
But the relative values of those two different species of food, bread and butcher's meat, are very different in the different periods of agriculture. 亚当·斯密.国富论.
Tumbled together on the table are some pieces of iron, purposely broken to be tested at various periods of their service, in various capacities. 查尔斯·狄更斯.荒凉山庄.
Habits easily become associated with other habits, with certain periods of time and states of the body. 查尔斯·达尔文.物种起源.
Moreover, between each successive formation we have, in the opinion of most geologists, blank periods of enormous length. 查尔斯·达尔文.物种起源.
Long periods of slowness and stagnation have alternated with shorter or longer periods of prolific growth, and these with seasons of slumber and repression. 威廉·亨利·杜利特.世纪发明.
Such periods have recurred in history. 约翰·杜威.民主与教育.
But the value of this evidence depends entirely on the perfection of the geological record, in relation to periods remote in the history of the world. 查尔斯·达尔文.物种起源.
During the alternate periods of elevation and of stationary level the record will generally be blank. 查尔斯·达尔文.物种起源.
Did they have restaurants there at three different periods of the world? 马克·吐温.傻子出国记.
From a very early age, however, there is no distinction of exclusive periods of play activity and work activity, but only one of emphasis. 约翰·杜威.民主与教育.
The performance of this duty requires, too, very different degrees of expense in the different periods of society. 亚当·斯密.国富论.
Sometimes she had periods of tight horror, when it seemed to her that her life would pass away, and be gone, without having been more than this. 戴维·赫伯特·劳伦斯.恋爱中的女人.
Even in the Azoic or Arch?ozoic Age there are traces in ice-worn rocks and the like of periods of intense cold. 赫伯特·乔治·威尔斯.世界史纲.
It is possible that in the past there have been periods of greater and lesser intensity. 赫伯特·乔治·威尔斯.世界史纲.
They have observed ninety-three different comets, and settled their periods with great exactness. 乔纳森·斯威夫特.格列佛游记.
Activity is divided, and two separate worlds are built up, occupying activity at divided periods. 约翰·杜威.民主与教育.
And there have been periods of great wetness and periods of great dryness throughout the earth. 赫伯特·乔治·威尔斯.世界史纲.
And because of this conviction I have determined to write down the story of the interesting periods of my life and of my death. 埃德加·赖斯·巴勒斯.火星公主.
Without the aid of artificial appliances a skilful diver may remain under water for two, or even three minutes; accounts of longer periods are doubtful or absurd. 佚名.神奇的知识之书.
At any rate we must admit that they hold a different place at different periods of the world's history. 柏拉图.理想国.
In both the Greek and medieval periods, the rule was to regard the individual as a channel through which a universal and divine intelligence operated. 约翰·杜威.民主与教育.
It does not change in regular periods. 赫伯特·乔治·威尔斯.世界史纲.
To form a right judgment of it, indeed, we must compare the state of the country at periods somewhat distant from one another. 亚当·斯密.国富论.
How short his time, and consequently how poor will be his results, compared with those accumulated by Nature during whole geological periods! 查尔斯·达尔文.物种起源.
In the active superintendence of this young person, Judy Smallweed appears to attain a perfectly geological age and to date from the remotest periods. 查尔斯·狄更斯.荒凉山庄.
It will be convenient to distinguish two main periods in the hundred years between 1814 and 1914. 赫伯特·乔治·威尔斯.世界史纲.