substitution是什么意思？

substitution

英[ˌsʌbstɪ'tju:ʃn] 美[ˌsʌbstɪˈtuʃən, -ˈtju-]

• n. 代替，代用，替换，<化>取代（作用）；

复数：substitutions;

例句

• Substitution, No.3 for No.4. 换人,4号下, 3号上.
• Therefore, in its origin, Standby was a substitution of bank guaranties. 因此, 从起源上来讲, 备用证的产生是出于替代银行保函的目的.
• We use saccharin in substitution for sugar. 我们用糖精代替糖.
• Severe steric effects at the reactive carbon would impede the substitution. 大的立体效应阻止在碳上的取代.
• The theory of hedonic price thinks there is substitution relation between wage and safety. 享乐价格理论认为工资与安全水平之间存在替代关系.
• It will become deepen to the students'recognization in mechanism of Aryl electrophilic substitution. 这些问题的讨论将深化学生对芳烃亲电取代反应机理的认识.
• Most direct substitution of groups bound to an aromatic nucleus is limited to diazonium salts. 大多数连于芳核能被直接取代的基团仅限于重氮盐.
• Many groups can be added by nucleophilic substitution on a diazonium salt. 许多基团可通过向得自胶的重氮盐作亲核取代而加以导入.
• In non - coding region It'shows mutation of single nucleotide deletion or substitution. 非编码区亦存在单个碱基缺失及置换突变.
• In my experience a straight substitution of carob for chocolate doesn'twork. 根据我的经验，用角豆制品直接代替巧克力行不通。

英语四级真题

Substitutions of one gesture for the other often create not only humorous but also embarrassing moment.
出自-2014年6月听力原文

柯林斯高阶英汉双解学习词典释义

• V-ERG
  用…代替;取代;替换
  If you substitute one thing for another, or if one thing substitutes for another, it takes the place or performs the function of the other thing.
  例句
  They were substituting violence for dialogue... 他们在用暴力取代对话。 You could always substitute a low-fat soft cheese... 你总是可以代之以低脂肪的软奶酪。
• N-COUNT
  代替者;代替物;代用品
  A substitute is something that you have or use instead of something else.
  例句
  She is seeking a substitute for the very man whose departure made her cry. 那个男人的离去令她伤心痛哭，她正想找一个人填补内心的空缺。 ...tests on humans to find a blood substitute made from animal blood. 为从动物血液中提取人血的替代品而在人体上进行的试验
• N-COUNT
  令人满意的替代物;与之媲美的事物
  If you say that one thing is no substitute for another, you mean that it does not have certain desirable features that the other thing has, and is therefore unsatisfactory. If you say that there is no substitute for something, you mean that it is the only thing which is really satisfactory.
  例句
  The printed word is no substitute for personal discussion with a great thinker... 阅读印在纸上的内容远不如与伟大的思想家面对面探讨那般受益。 There is no substitute for practical experience. 实践经验是无法替代的。
• N-COUNT
  替补(运动员)
  In team games such as football, a substitute is a player who is brought into a match to replace another player.
  例句
  Coming on as a substitute, he scored four crucial goals for Cameroon. 作为替补队员上场的他为喀麦隆队打入了四粒关键进球。

英汉词典释义

• n.
  代替;代用;替换
  We use saccharin in substitution for sugar. 我们用糖精代替糖。

英英词典释义

• Noun
  1. an event in which one thing is substituted for another;
  "the replacement of lost blood by a transfusion of donor blood"
  2. the act of putting one thing or person in the place of another: "he sent Smith in for Jones but the substitution came too late to help"

行业词典

• 体育： 代替；换置；替补；换人；
  农学： 代换；
  化学： 取代；
  医学： 取代，置换：将一物替代另一物，尤指一个元素或一个基团为其他的元素或基团所取代的化学置换；代替，替换：一个达不到的或不能接受的目标、情感或目的，被一个可以达到的或可以接受的目标、情感或目的所代替的无意识的防御机制；
  心理学： 替代；
  数学： 代入；
  法律： 合同替代；
  电力： 置换；
  药学： 置换；