Theory

(noun.) a belief that can guide behavior; 'the architect has a theory that more is less'; 'they killed him on the theory that dead men tell no tales'.

(noun.) a well-substantiated explanation of some aspect of the natural world; an organized system of accepted knowledge that applies in a variety of circumstances to explain a specific set of phenomena; 'theories can incorporate facts and laws and tested hypotheses'; 'true in fact and theory'.

法耶手打

• The understanding of the place of theory in life is a comparatively new one. 沃尔特·李普曼. 政治序论.
• I had heard that very voice ere this, and compulsory observation had forced on me a theory as to what it boded. 夏洛蒂·勃朗特. 维莱特.
• Much of their theory must seem to the modern mind merely fanciful and unsupported speculation. 李贝. 西洋科学史.
• The same theory accounts for the esteem and regard we pay to men of extraordinary parts and abilities. 戴维·休谟. 人性论.
• Some make fun of it, some overpraise, and nearly all insist that I had a deep theory to expound, when I only wrote it for the pleasure and the money. 路易莎·梅·奥尔科特. 小妇人.
• But a human impulse is more important than any existing theory. 沃尔特·李普曼. 政治序论.
• Hence, the canon of Natura non facit saltum, which every fresh addition to our knowledge tends to confirm, is on this theory intelligible. 查尔斯·达尔文. 物种起源.
• This theory has since that time been abundantly confirmed by navigators. 李贝. 西洋科学史.
• But the evil doesn't come from the fact that it plays horse with the Newtonian theory of the constitution. 沃尔特·李普曼. 政治序论.
• I belong to the shop, only my sister has a theory that our governor must never know it. 查尔斯·狄更斯. 小杜丽.
• Then it is that theory is put to the test. 赫伯特·乔治·威尔斯. 世界史纲.
• The blind theory won't do. 阿瑟·柯南·道尔. 福尔摩斯归来记.
• The emperor at Constantinople was, in theory at least, still emperor. 赫伯特·乔治·威尔斯. 世界史纲.
• Not much argument was needed to maintain the truth of a theory which to his own contemporaries seemed so natural and congenial. 柏拉图. 理想国.
• For on the theory, such strata must somewhere have been deposited at these ancient and utterly unknown epochs of the world's history. 查尔斯·达尔文. 物种起源.
• For Frederick had broken down now, and all his theories were of no use to him. 伊丽莎白·盖斯凯尔. 南方与北方.
• The two theories need to be held together, yet clearly distinguished. 沃尔特·李普曼. 政治序论.
• He had his own theories of the arts of public address. 鲁伯特·萨金特·荷兰. 历史性发明.
• These theories take no account of the telegram. 阿瑟·柯南·道尔. 福尔摩斯归来记.
• You are too many for me when you begin to get on your theories, Mr. Holmes, said he. 阿瑟·柯南·道尔. 福尔摩斯归来记.
• Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. 阿瑟·柯南·道尔. 福尔摩斯历险记.
• Men must observe for themselves, and form their own theories and personally test them. 约翰·杜威. 民主与教育.
• I can depend upon myself for having no go-ahead theories that I would rashly bring into practice. 伊丽莎白·盖斯凯尔. 南方与北方.
• For words, theories, symbols, slogans, abstractions of all kinds are nothing but the porous vessels into which life flows, is contained for a time, and then passes through. 沃尔特·李普曼. 政治序论.
• Ideas, as we have seen, whether they be humble guesses or dignified theories, are anticipations of possible solutions. 约翰·杜威. 民主与教育.
• Theories are all very well, but we have to deal with a hard-headed British jury. 阿瑟·柯南·道尔. 福尔摩斯历险记.
• But what is the good of all these vague theories, cried the banker impatiently, when I have told you that I saw Arthur with the coronet in his hands? 阿瑟·柯南·道尔. 福尔摩斯历险记.
• Our theories assume, and our language is fitted to thinking of government as a frame--Massachusetts, I believe, actually calls her fundamental law the Frame of Government. 沃尔特·李普曼. 政治序论.
• From which, said Wemmick, conjectures had been raised and theories formed. 查尔斯·狄更斯. 远大前程.
• But men do not begin to act upon theories. 赫伯特·乔治·威尔斯. 世界史纲.

手打:斯坦