词性及解释
n.
代替, 替换, 代替物
【计】
置换
【化】
取代
【医】
取代, 置换
词形变化
形容词: substitutional
副词: substitu-tionally
英英解释
-
1.
n.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"
-
2.
n.an event in which one thing is substituted for another
[例]
○ the replacement of lost blood by a transfusion of donor blood
常用词组
例句
1.
Currently the library user is witnessing the large-scale substitution of microfilm AND microfiche version for older AND less durable works
目前，图书馆用户发现大量缩微胶卷和平片已成为古老而不易保存的著作的代用品。
2.
Most commercial sodium carboxymethylcellulose (CMC) products have a degree of substitution (DS) in the range 0.4--0.8.
大多数羧甲基纤维素钠具有0.4～0.8的取代度(DS)。
3.
The substitution of one metrical unit FOR another, especially the substitution of two short syllables FOR one long syllable in quantitative verse.
长音节的拆分或替换一个韵律元素替代另一个，尤指在数量韵文中用两个短音节替代一个长音节
4.
The substitution of one metrical unit for another, especially the substitution of two short syllables for one LONG.syllable in quantitative verse.
长音节的拆分或替换一个韵律元素替代另一个，尤指在数量韵文中用两个短音节替代一个长音节
5.
amines can engage in nucleophile substitution reaction with alky
胺能参加与卤代烷的亲核取代反应。
6.
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。
7.
base substitution mutation
碱基置换突变
8.
In cryptography,a cipher produced by a composition of a number of substitution and transposition ciphers.
密码学中，由替代密码和置换密码结合使用而构成的一种密码。
9.
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。
10.
77 Liverpool substitution Alonso for Pennant. Gerrard moves to the right.
77分–利物浦换人：阿隆索入替彭南特。杰拉德移到右边去。
词汇听力：
小测验：选择正确的单词