substitution

There is no substitute for practical experience.

实践经验是无法替代的。

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.

Amines can engage in nucleophile substitution reaction with alky.

胺能参加与卤代烷的亲核取代反应.

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。

There are five types of cohesion: reference, substitution, ellipsis, conjunction and lexical cohesion.

衔接有五种类型: 指称 、 替代 、 省略 、 连接和词汇衔接.

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.

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。

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.

The procedure for solving the Eqs is called back substitution.

解方程组的这一步骤叫回代.

That's not a paradox, because rising wages have an income as well as a substitution effect.

这不是悖论, 是因为工资增长有收入效应还有替代效应.

So , they are the optimum substitution of traditional ironclad switch and oil - immersed type switch.

是取代传统的机壳式开关,油 浸式 开关的最佳换代产品.

Substitution Box: Teams may interchange players at any time.

8替换区: 球队可以随时换人.

All conditions for a rule must be fulfilled in order for the substitution to be made.

要让替换发生,必须是设定的所有条件都满足才回发生.

The main improvement the substitution of 8031 single chip microcomputer for TP 801 A single board microcomputer.

它是对80年代设计的汽车排气检测微型机系统的改造.

Substitutions must occur at or within the team's substitution box.

替换必须发生在本队内的替换区.

Substitution, No.3 for No.4.

换人,4号下, 3号上.

We use saccharin in substitution for sugar.

我们用糖精代替糖.

Subrogation is the substitution of one person or thing for another.

代位行使是指由一个人或一件东西来代替另一个.

Coach Ross made two substitutions in the second half.

罗斯教练在下半场两次换人。

The substitution of rolling friction for sliding friction results in a very considerable reduction in friction.

用滚动摩擦代替滑动摩擦,结果使摩擦大大减少.

Advise customers on substitution or modification of parts when identical replacements are not available.

在相同的替换零件实效的情况下建议客户采用其他替换零件或是改良零件.

Substitution of the materials or equipment shall be subject to the provisions of the Contract.

材料和设备的代用应遵从合同的规定.

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。

The single segment substitution lines ( SSSLs ) were perfect materials for analysis of gene especially for QTL.

单片段代换系是进行基因分析特别是QTL分析的理想材料.

Substitution: Player No. 4 for No. 3.

换人: 3号下,4号上.

...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

It was only a question of a trifling substitution of names.

那不过是一件小小的冒名顶替的事罢了.

The currency substitution has occurred in Latin America for a long time.

摘要用美元代替本国货币在拉丁美洲已经有很长历史.

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。