不幸的是，抽象是有漏洞的：例如，在我的ZIP代码验证器中，本想使用正则表达式执行检测。
Unfortunately, the abstraction is leaky: in my ZIP code validator, for example, I would have liked to use regular expressions to perform the check.
抽象语法树是一个表示为对象集合的表达式。
An abstract syntax tree is an expression represented as a collection of objects.
它构造一种抽象形式的Erlang表达式，并返回一个匿名函数，让它以后再动态地求解。
It builds an Erlang expression in abstract form and returns an anonymous function which can dynamically evaluate it later.
Erlang还允许我们编程访问经过词法分析(tokenized)、语法分析之后、抽象形式的表达式。
Erlang also gives us programmatic access to the tokenized, parsed and abstract forms of an expression.
抽象所有正则表达式实现背后的概念。
S the concepts behind all regular expression implementations.
这是因为GWT对宿主环境底层的正则表达式机制的依赖也是不完美抽象所带来问题的一个例子。
This is because of GWT's reliance on the host environment's underlying regexp mechanism and is an example of the trouble that imperfect abstractions can land you in.
Derive是使用Lisp语言编写的，Lisp是一种公共编程语言，尤其适合基于规则的处理，该处理是将一个抽象数学表达式变换为另一个表达式所必需的。
Derive is written in Lisp, a common programming language that is especially suited for the kind of rule-based processing necessary for transforming one abstract mathematical expression into another.
接着本文分析了经济语篇中概念隐喻的隐喻表达式、源域以及隐喻对理解抽象经济概念的作用。
Then the study analyzes the metaphorical expressions, source domains and functions of conceptual metaphors in the comprehension of abstract economic concepts and phenomena.
接着本文分析了经济语篇中概念隐喻的隐喻表达式、源域以及隐喻对理解抽象经济概念的作用。
Then the study analyzes the metaphorical expressions, source domains and functions of conceptual metaphors in the comprehension of abstract economic concepts and phenomena.
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