| 单词 | 仅有一个 |
| 释义 | 〔unicuspid〕Having only one cusp. Used of a tooth.单尖的：仅有一个牙尖。用于指牙齿〔item〕The worditem seems to us to be very much a noun, whether it refers to an article in a collection or a bit of information.But it began its life in English (first recorded before 1398) as an adverbmeaning "moreover, also, in addition.”Item as typically used in front of each object listed in an inventory, as we might putalso. This use in English simply reflects a meaning of the word in Latin.However, it is easy to see howitem could be taken to stand for the thing that it preceded, and so we get, for example, the sense "an article included in an enumeration.”The first such usages are found in the 16th century,while the sense "a bit of information" is not found until the 19th century.In the 20th century we added a computer sense,a further addition toitem. 单词item 对我们来说只是一个名词， 它可以指一个文集中的一篇文章或者是一些信息。但是它的起源却是一个副词（最早见于1398年以前），意思为“此外，而且，同样”。Item 最典型是用在商品目录的每一个物品的前面， 就象我们使用also 一样。 这种用法反映在拉丁词语上仅有一个含义。然而，明白item 是怎样被用来代表它前面的事物是很容易的， 所以我们得到了像“文集中的一篇文章”等这种含义。这种用法最早见于16世纪，而含义“一些信息”一直到19世纪才被发现使用。在20世纪时，我们加了一个计算的含义，进一步形成了今天的item 〔mononuclear〕Having only one nucleus:单核的：仅有一个核的：〔monovalent〕Having only one site of attachment. Used of an antibody or antigen.仅有一个附着地点的。用于抗体或抗原〔protagonist〕Theprotagonist of a Greek drama was its leading actor, of whom there could be but one in any play.This is an etymological nicety that many modern writers continue to observe when using the word to refer to the main character of a drama or other fiction.Thus when the members of the Usage Panel were asked "How many protagonists are there inOthello ?” the great majority answered "One"and offered substitutes such asantagonist, villain, principal, and deuteragonist to describe Desdemona and Iago. But there is reputable precedent from the 17th century on for usingprotagonist to mean simply "important actor" or "principal party,”with no implication of uniqueness,as inThere are three protagonists in this sluggish novel. Smith and Jones were the protagonists in the struggle over the future of the computer company. Thus, while some writers may prefer to confine the word to a singular sense in their own usage,it is pedantic to insist that the looser use is incorrect. ·The use ofprotagonist to refer to a proponent has become common only in the 20th century and may have been influenced by a misconception that the first syllable of the word represents the prefixpro-, "favoring.” In sentences such asHe was an early protagonist of nuclear power, this use is likely to strike many readers as an errorand can usually be replaced byadvocate or proponent with no loss of sense.希腊戏剧的protagnist 是主角， 且在任何戏剧中仅有一个主角。许多现代作家在用这个词时都注意使它指代戏剧或其他小说的主要人物，因此当用法专题小组成员被问及“在奥赛罗 里有几个主要人物?”时， 大部分人回答“一个”，而且用如antagonist、villain、principal 和 deuteragonist 等词来描述苔丝德蒙娜和雅各。 但是从十七进纪开始，有一个使用protagonist 的规范惯例， 仅表示“重要的演员”或“首要的政党”，而丝毫没有独一无二的暗示，象在句子在这部文风拖沓的小说中有三个人物。 史密斯和琼斯是为计算公司的未来而奋斗的主角中一样。 因此，当某些作家可能在他们自己的用法中偏于把这个词限制在一个简单的含义中时，仍强调自由用法不正确就是卖弄学问的了。用protagonist 来指代建议者或支持者仅在20世纪开始变得常见， 而且被对于代表意为“支持的”前缀pro- 的该词第一个音节的误解所影响。 在句子他是核武力的早期支持者 中， 这种用法可能会使读者认为是个错误，而且常被advocate 或 proponent 所替代， 同时也不会有任何意思的遗漏〔olefin〕Any of a class of unsaturated open-chain hydrocarbons such as ethylene, having the general formula CnH 2 n; an alkene with only one carbon-carbon double bond. 烯烃：任何一类不饱和的开链碳氢化合物，如乙烯，总分子式为CnH 2 n；仅有一个碳—碳双链的链烯 〔monothematic〕Having only one theme.仅有一个主题的〔univalent〕Having only one valence.仅有一个原子价的 |
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