英:[sɜ:d]
美:[sɜrd]
英:[sɜ:d]
美:[sɜrd]
adjective
lacking sense : irrational
surd conceits of scripture's sense—Thomas Jackson
voiceless—used of speech sounds
noun
an irrational root (such as √3)
irrational number
a surd speech sound
1550年代,“无理数”的意思来自拉丁语 surdus “聋,未被听到的,沉闷的; 故意装聋作哑的,不注意的”,可能与 susurrus “低语,耳语”(见 susurration)有关。数学意义上的“无理数”来自于拉丁语 surdus 用于翻译阿拉伯语 (jadhr) asamm “聋(根)”,本身似乎是希腊语 alogos 的借译,字面意思是“无言,没有理由”(欧几里得第十卷,定义)。在法语中, sourd 仍然是“聋”的主要词汇。名词从1540年代开始使用。相关: Surdity。
Adjective Latin surdus deaf, silent, stupid
The first known use of surd was in 1557
1 These 'surds' of metaphysics ought to occasion no more difficulty in speculation than a perpetually recurring fraction in arithmetic.
2 It is classed as a surd spirant, its corresponding sonant spirant being v, which is distinguished from f by being pronounced with voice instead of breath, as may be perceived by pronouncing ef, ev.
3 During our conversation he used the words “slippage” and “surd,” the last of which sent me to the dictionary.
4 I will avoid equations, And shun the naughty surd, I must beware the perfect square, Through it young girls have erred: And when men mention Rule of Three Pretend I have not heard.
5 The problems have a surd or irrational element in them; and to solve them would be to bring reason into collision with itself.
6 The terms sonant and surd are, in a scientific point of view, the least exceptionable.
7 “Oh, all right, sir, it’s ’surd, then; you know best, o’ course.
8 You have made a surd perfectly absurd, and—” “Mr Hasnip!” came from the other end of the great room.
9 The square root of 5 is a surd.
5的平方根是不尽根.
10 The art of calculating with any species of notation; as, the algorithms of fractions, proportions, surds, etc.
11 Coercion is the surd in almost all social theory, except the Machiavellian.
12 We may say that the sonant consonant and its corresponding surd are the hard and soft forms of the same sound.
13 Adj. deaf, earless†, surd; hard of hearing, dull of hearing; deaf-mute, stunned, deafened; stone deaf; deaf as a post, deaf as an adder, deaf as a beetle, deaf as a trunkmaker†. inaudible, out of hearing.
14 Tell we, we twain, Unreasons which in life Deal me inexorable, contrary Destinies surd to prayer and tearful woe.
15 Sometimes they grunt or say “Aha” or “Trade you” or “Got you back”; or they exchange new, obscure good-natured insults: “You surd!”
16 Conversely every positive quadratic surd number, when expressed as a simple continued fraction, will give rise to a recurring fraction.
17 Since the fraction is infinite it cannot be commensurable and therefore its value is a quadratic surd number.
18 Review the method of finding the square root of a binomial surd.
19 Yet what are all such gaieties to me Whose thoughts are full of indices and surds? x2 + 7x + 53 = 11⁄3.
20 We have already seen that there are two classes of consonant sounds, those which have a voice sound, as b, called sonant, and those which are mere breath sounds, like p, called surds or aspirates.
2 不合理
unreasonable unjust illogical preposterous unearthly unreasoning inapposite unreasoned unreason without rhyme or reason
3 无理数
4 荒谬
hot ridiculous nonsense absurd irrational over-the-top nonsensical preposterous Gilbertian hop absurdity lunacy
5 无理
irrational unwarranted wanton unjustifiably illogic unreasonable extravagant incommensurable ill-founded unmannerly
9 无理数的
11 不尽根
12 不尽根的
13 无声子音