The method of the definite integral by substitution is one of the main techniques among the definite integral calculation.
定积分换元法是定积分计算的主要方法之一。
A specialized domain, such as programming phrases, can be introduced by substitution anywhere that the root elements are allowed.
专门的领域，如编程惯用语，可通过在任何允许根元素的地方进行置换来引入。
Doxofylline was synthesized from theophylline by substitution, oxidation and condensation. The structure has been proven by IR and MS.
以茶碱为原料经取代、氧化和缩合反应制备多索茶碱；其结构为IR及MS所证实。
Specific examples were cited to analyze the mistakes and causes in the use of integration by substitution, and the general method was pointed out to avoid such kinds of mistakes in operation.
通过实例分析了在换元积分法中容易犯的一类错误及其产生的原因，指出了在解题中避免产生这类错误的一般方法。
Preparation of cement clinker by substitution of rare earth tailing(RET) for clay were investigated. The effect of adding RET on the sintering of cement clinker and it's performance was discussed.
研究了利用稀土尾矿代替粘土配料烧制水泥熟料，探讨了稀土尾矿对水泥熟料煅烧和性能的影响。
The risk of reaction using phosgene could be avoided effectively by substitution of triphosgene for phosgene, and application of triphosgene in production with broad prospect was believed by author.
用三光气代替光气合成化合物能有效消除光气的危险性，在生产中具有较广泛的应用前景。
The first backquote not preceded by a backslash terminates the command substitution.
不带反斜杠的第一个后引号终止命令替换。
The chiral HMPA analogues were prepared in high yield by nucleophilic substitution between the chiral secondary amine and phosphoryl chloride.
通过磷酰氯与手性仲胺的亲核取代反应高产率地合成了手性HMPA 类似物。
However, it is also vital that the infrastructure supports the substitution of one service implementation by another with no effect to the clients of that service.
然而，基础架构支持在不影响服务的客户端的情况下由另一个服务实现替代原有的服务实现也是至关重要的。
If it is possible to return the data to the client without serialization, by binding directly to an XML output host variable, this is the safest way to avoid any kind of substitution character.
如果可以在不串行化的情况下将数据返回到客户机，那么，通过直接绑定到一个XML输出主机变量，这是避免任何替换字符的最安全的方法。
This means that all temporary variables used by a macro are automatically renamed before the substitution occurs in order to prevent them from having conflicting names.
这意味着宏所使用的所有临时变量都会在替换发生之前自动重新进行命名，从而防止名字产生冲突。
This string is then written back into the timestamp line by the substitution command.
这个字符串然后被替代命令写回时间戳。
By declaring an element or type to be abstract, XML Schema provides a mechanism to force substitution for it.
通过声明抽象的元素或者类型，XMLSchema提供了一种强制替换机制。
Schema-element (Person) matches an element node which is declared to be in the substitution group headed by the Person element.
schema -element (Person)匹配一个元素节点，该节点必须在以Person开头的代替组中声明。
Now, a word about placeholder substitution: Velocity will print any unrecognized reference as plain text, as illustrated by the next two bold lines in Listing 6.
关于占位符替换的一点说明：Velocity把任何不能识别的引用作为普通文本打印，如清单6中下面突出显示的两行(蓝色和红色)所示。
yA Over yA of one. Minus yA of two, and I just want to, in some sense, finish up by making the obvious substitution, which is, of course these are mole fractions.
除以1的yA，减去2的，我只想，从某种意义上，得到更加简单的取代形式，当然这些是摩尔分数。
But simple substitution cyphers can be fun to play with, especially in an RPG context by handing someone an encoded message that they can work out during game play.
但是简单的置换密码玩起来很有趣，尤其是在RPG环境中给某个人传递一条可以在玩游戏的过程中破解出来的编码信息。
Substitution support has been enhanced to support a new pattern: a temporary absence defined by a time interval.
替换支持已经得到增强，可以支持一个新模式：按时间间隔定义的临时缺席。
In reality, the picture is complicated by the substitution in both supply and demand among different agricultural commodities, and by the role of the corn ethanol program.
实际上，在供求两个方面都有不同农产品作替换，加之玉米乙醇项目的实施，导致上述简单的关系变得复杂化。
Next, you need to associate the values by using a substitution.
下一步，您需要使用置换关联值。
In other words, when we make meaningful statements we do so by acting on the combined resources of difference and rhetorical substitution.
换句话说，当我们陈述的时候我们必须依赖差异性和修辞的替代作用的综合运用。
Performance Tester indicates that these values are good candidates for substitution with datapool values by changing the color of the text to green.
Performance Tester指出这些数值是代替数据池数值的很好的候选者，候选者是通过将文本颜色变成绿色来标识的。
The UpdateTimestamp() function performs a substitution (s/.../.../) on every line being written, by specifically limiting the range of the substitution to between '[ and '] like so: '[,']s/.../.../.
UpdateTimestamp()函数，通过专门将替换的范围限制在'[和 ']之间，在每个正在被编写的代码行上执行一个替代（s/.../.../），像这样：'[,']s/.../.../。
The character is replaced by a substitution character before parsing takes place, and results in the element tag name throwing a SQL error code "16110 XML Syntax error.
在解析之前，该字符被一个替换字符替代，导致元素标记名称抛出一个SQL错误代码 "16110XMLSyntax error.
It returns true if the element in the instance document is declared to be in the substitution group headed by the element identified by the element QName.
如果实例文档中的元素被声明为位于以元素QName指定的元素为首的代替组中，则返回true。
The healing style was characterized by plate bone substitution, with no disordering callus.
骨愈合形式均呈骨板样骨替代，未见无序骨痂出现。
The healing style was characterized by plate bone substitution, with no disordering callus .
骨愈合形式均呈骨板样骨替代，未见无序骨痂出现。
Most of them are based on electrical substitution principle and calibrated by electrical power or energy.
它们大多是基于电替代原理，用电功率和电能进行校准。
Variable substitution is not done in text literals which are surrounded by single quotes (apostrophe s).
在被单引号(即省略号，呼号)环绕的文本字面值里，变量替换不会进行。
Variable substitution is not done in text literals which are surrounded by single quotes (apostrophe s).
在被单引号(即省略号，呼号)环绕的文本字面值里，变量替换不会进行。
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